Answer:
-19
Step-by-step explanation:
2x+15=-23
2x=-23-15
2x=-38
x=-19
Suponha que, em sua empresa familiar,
Dona Joana vende um salgadinho a x reais
(por unidade). A quantidade vendida por dia
diminui com o preço e é dada por 32 – x.
Portanto, a equação quadrática
x (32 – x) = 31
significa que, com o preço x, o total
apurado nas vendas, isto é, a receita, é igual
a 31 reais por dia.
Qual o menor preço X do salgadinho para
que isto ocorra?
Answer:
1 Real
Step-by-step explanation:
Para encontrarmos o menor preço "x", do salgadinho que a empresa familiar Dona Joana costuma vender, basta resolvermos a equação quadrática informada pelo enunciado. Veja:
x(32 − x) = 31
Com a equação de 2º grau na forma fatorada, é possível desmembrarmos em duas outras equações. Uma delas é x = 31, que veio dos termos em negrito: x(32 − x) = 31, e a outra raiz é: 32 - x = 31, que veio dos termos em negrito x(32 − x) = 31.
Calculando as raízes:
x = 31
ou
32 - x = 31 ⇔ -x = 31 - 32 ⇔ -x = -1 ⇔ x = 1
Assim, as raízes são x = 31 e x = 1.
Testando os valores:
Para x = 31:
x(32 − x) = 31
31(32 - 31) = 31
31(1) = 31
31 = 31
Para x = 1
x(32 − x) = 31
1(32 - 1) = 31
1(31) = 31
31 = 31
Ok, está correto! E o menor valor do salgadinho para que a receite dê R$ 31,00 é R$ 1,00.
Resposta:
Portanto, o menor preço que o salgadinho pode ter para que a receita seja igual 31 reais é R$ 1,00.
am i right or wrong? i think im right but im not sure please help will give brainliest. if im wrong please explain the right answer to me
Answer:
Correct, good job!
Step-by-step explanation:
45% of $450:
$450 × 0.45 = $202.50
Add the 45% of $450 to $450
$202.50 + $450 = $652.50
I used a different method to double check your work
Determine the end behavior of the function: f(x)= -3x*4
The following graphs are transformations of f(x) = x^2.
Complete the boxes below to describe the transformations.
A(x) = f (x + _) + _
B(x) = f (x + _) + _
C(x) = f (x + _) + _
D(x) = f (x + _) + _
Step-by-step explanation:
Let's look at A(x) and see how it is different from f(x)
it is shifted downwards by 8 unitsit is not shifted to the left or the rightTherefore A(x) = f(x) - 8
Let's look at B(x) and see how it is different from f(x)
it is not shifted downwards or upwardsit is shifted to the left 7 unitsTherefore B(x) = f(x + 7)
Let's look at C(x) and see how it is different from f(x)
it is shifted upwards by 4 unitsit is shifted to right by 5 unitsTherefore C(x) = f(x - 5) + 4
Let's look at D(x) and see how it is different from f(x)
it is not shifted downwards or upwardsit is not shifted to right by 12 unitsTherefore D(x) = f(x - 12)
2. Jacque Cousteau is in a submarine at a depth of 112m. The submarine is rising at a constant rate of 2 metres every 3 seconds. a) Write an equation to represent the submarine's depth, D in metres, with respect to time, t, in seconds.
I hope this makes sense!!!!
PLEASE ANSWER FAST
Consider the graph of y = -3|xl. What will be the effect
on the graph if –3 is replaced with 3?
a. no change
b. a flip over x axis
c. vertical shift
d. horizontal shift of one unit to right
Answer:
B
Step-by-step explanation:
Essentially, the -3 in this equation is the slope, and when you multiply slope by -1 you are reflecting over the x axis.
10 (a) Simplify
t+t+t
3 bc im right and your wrong im bigger your smaller and idek what im saying
Joann is buying a new couch with a discount of 18%. If the original cost of the couch was $610, what is the discounted price?
Which equations represent the final cost, x, of the couch?
Select all that apply.
x=610−610(0.18)
x=610(0.82)
x=610+610(0.18)
x=610(82)
x=610(1+0.18)
x=610−610(18)
x=610(1−0.18)
Answer:
$500.92
Step-by-step explanation:
geometry: pls help :(
Match each condition to the number of triangles that can be constructed to fit the condition. condition A: one side measuring 4 inches, another side measuring 8 inches, and a third side measuring 10 inches condition B: one angle measuring 60°, another angle measuring 40°, and a third angle measuring 90° condition C: one side measuring 4 inches, another side measuring 8 inches, and the angle between them measuring 70° condition D: one side measuring 5 inches, another side measuring 7 inches, and a third side measuring 12 inches condition E: one angle measuring 30°, another angle measuring 80°, and the length of the included side measuring 8 inches condition F: one angle measuring 40°, another angle measuring 80°, and a third angle measuring 60°
Answer:
I think the guy above me means:
No Triangles: A, C
One Triangle: D, F
Many Triangles: B, E
Step-by-step explanation:
¯\_(ツ)_/¯
The no triangle possible: B and D, one triangle possible : A, C, and E, and many triangles: F.
What is the triangle?The triangle can be defined as a three-sided polygon in geometry, and it consists of three vertices and three edges. The sum of all the angles inside the triangle is 180°.
Checking for the A)
4 + 8 > 10
There is one triangle possible.
For B)
60 + 40 + 90 = 190 ≠ 180 degree
No triangle possible because the sum of the angles in triangle is 180 degree.
For C)
There are two sides are given and one angle so SAS
One triangle is possible.
For D)
7 + 5 = 12
There is no triangle possible because the sum of the two sides is equal to the third side.
For E)
By the rule of ASA one triangle is possible.
For F)
60 + 80 + 40 = 180 degree
There are three angles are given, but no sides are given, so many triangles are possible.
Thus, the no triangle possible: B and D, one triangle possible : A, C, and E, and many triangles: F.
Learn more about the triangle here:
brainly.com/question/25813512
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-16+ x= -15
Need this answer
Answer:
x=1
Step-by-step explanation:
Add
16
to both sides of the equation.x=−15+16 Add −15 and 16.x=1
Answer:
Step-by-step explanation:
-16 + x = - 15
Add 16 to both sides
-16 + 16 + x = -15 + 16
x = 1
Zx and Zy are supplementary angles. Zy measures 108°,
What is the measure of Zx?
Stuck? Watch a video or use a hint.
Answer:
72°
Step-by-step explanation:
Given
Zy = 108°
Zx = ?
We know
Zx + Zy = 180° {being supplementary angles }
Zx + 108° = 180°
Zx = 180° - 108°
Zx = 72°
Hope it will help :)
A baker made 20 muffins for a cafe. By noon, 15% of the muffins were sold. How many muffins were sold by noon?
Answer:
15% of 20 is 3, so 3 muffins were sold.
Step-by-step explanation:
To get this answer, multiply the percent by the total (15 x 20 = 300) and then divide the answer by 100. (300 / 100 = 3). Hope this helps :)
Answer:3
Step-by-step explanation:
0.15x20=3
0.15 is the percent of muffins, to find out a percentage over a number, you do the percentage dived by 100. Than, you multiply it by the number.
ANSWER CHOICES LISTED!!!
what was done to the linear parent function f(x)=x to get the function g(x)=1/7 x?
A. Vertically stretched by a factor of 7
B. Shifted 1/7 unit up
C. Vertically compressed by a factor of 7
D. Horizontally compressed by a factor of y
Answer:f(x) = x becomes g(x) = (1/5)x through vertical compression by a factor of 5.
Step-by-step explanation:
Answer:
Option C
Step-by-step explanation:
A vertical compression by a factor of 7, would result in in g(x) being 1/7 times f(x)
37 degrees Celsius to Fahrenheit
Answer:
98.6 Fahrenheit
Step-by-step explanation:
Sherry is making snack mix for a school field trip.
The recipe shows the amount of each ingredient needed to make 6 bags.
Complete each statement to adjust the ingredients for each new situation if Sherry uses this recipe.
1. To make 18 bags of snack mix, Sherry needs____ cups of almonds
2. Sherry needs 6 cups of granola to make____ bags of the snack mix.
3. If Sherry uses 1 cup of cranberries, she will need to use____ cups of raisins.
4. The recipe will make____ bags of the snack mix if Sherry uses only 1 cup of granola.
Answer:
Step-by-step explanation:
1- To make 18 bags of snack mix, Sherry needs 4.5 cups of almonds.
As the original recipe is for 6 bags, and here Sherry wants to triple that amount. You have to multiply 1.5 x 3.
2- Sherry needs 6 cups of granola to make 12 bags of the snack mix.
If Sherry gets 6 bags using 3 cups of granola, she will get 12 by using 6 cups of granola.
3- If Sherry uses one cup of cranberries, she will need to use 2 cups of raisins.
As 1 cup of cranberries is the double of what the recipe states, Sherry should also double the amount of cups of raisins.
4- The recipe will make 2 bags of the snack mix if Sherry uses only one cup of granola.
As 1 cup of granola is a third of the amount detailed in the recipe for 6 bags, the amount of bags will also be reduced to a third. 6/3=2
PLZ MARK BRAINLIEST IT TOOK LONG TO WRITE PLZZ
The picture shows a blue rectangle split into 6
equal parts and an orange rectangle split into 6
equal parts.
Drag figures to each box so that their total area is equal to the number given.
Answer:
what is the answer?
Step-by-step explanation:
Answer:
Answers are in the pictures.
Step-by-step explanation:
Find the length of GH.
- 10 -9 -8 -7 -6 -5 4 -3 -2 -1
1
-2
-3
G(-9, 4)
-5
-6
H(-2. -6.7
-8
-9
+10
A. About 3 units
B. About 7.3 units
C. 53 units
D. 9 units
Answer: About 7.3 units
Step-by-step explanation: I got it right
The length of the segment GH is given by the distance D = 7.3 units
What is the distance of a line between 2 points?The distance of a line between 2 points is always positive and given by the formula
Let the first point be A ( x₁ , y₁ ) and the second point be B ( x₂ , y₂ )
The distance between A and B is D , and the distance D is
Distance D = √ ( x₂ - x₁ )² + ( y₂ - y₁ )²
Given data ,
Let the first point be G ( -9 , -4 )
Let the second point be H ( -2 , -6 )
Let the length of the segment GH = D
Now , distance between G and H is D , and the distance D is
Distance D = √ ( x₂ - x₁ )² + ( y₂ - y₁ )²
On simplifying , we get
D = √ ( -9 - ( - 2 ) )² + ( -4 - ( -6 ) )²
D = √ ( -7 )² + ( 2 )²
On further simplification , we get
D = √ ( 49 + 4 )
D = √53
D = 7.28 ≈ 7.3 units
Hence , the distance is 7.3 units
To learn more about distance between 2 points click :
https://brainly.com/question/18234495
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JD opened a savings account with $400. The simple interest rate is 3% per year.
How much total money, including interest, will be in his account after 2 years?
Answer:
$424
Step-by-step explanation:
3%=0.03
400X0.03=12
12X2
24(2 YEARS)
400+24=$424
Help me with my math pls
[tex]18 - ( \sqrt[3]{27} )^{3} [/tex]
Answer: -9
[tex]( \sqrt[3]{ - \frac{1}{8} } )^{3} + 3 \frac{3}{4} [/tex]
Answer: 3 5/8.
[tex]5 \sqrt[3]{729} - 24 [/tex]
Answer: 21.
[tex] \frac{1}{4} - 2 \sqrt[3]{ \frac{1}{216} } [/tex]
Answer: 7/12.
[tex]54 + \sqrt[3]{ - 4096} [/tex]
Answer: 38.
[tex]4 \sqrt[3]{8000 } - 6[/tex]
Answer: 74.
Make h the subject
G=5h-2f÷3
Answer:
I think H=5g-2f÷3 ( I'm not sure at all sorry )
PLEASE HELP ASAP!! Students take a test worth a total of 100 points. There are 24 questions on this test, some are worth 5 points and others are worth 3. Solve for how many 5 point questions and 3 point questions there are on the test
Answer:
There are 14 5-point questions and 10 3-point questions.
Step-by-step explanation:
Form 2 equations:
Let x= 5-point questions
Let y= 3-point questions
1.) x+y=24
2.) 5x+3y=100
Use substitution by reforming equation 1 in terms of x or y (I used y)
1.) y=24-x
Sooo, substitute this into the y in the 2nd equation:
5x+3(24-x)=100
5x+72-3x=100
2x=100-72
2x=28
x=14
Now that we have x, substitute this into the 1st equation to get y:
1.) y=24-x
y=24-14
y=10
In conclusion, there are 14 5-point questions and 10 3-point questions.
Answer:
There are 14 questions that are worth 5 points and there are 10 questions that are worth 3.
Step-by-step explanation:
14 x 5 = 70
10 x 3 = 30
70 + 30 = 100
14 + 10 = 24 questions total
-4(x-5)+8x=9x-3
Can somebody help me with this problem
Answer:
6.2x
Step-by-step explanation:
x = -17/5
hope its helpful ❤❤❤
THANK YOU.
❤
Why is the percent increase from 45 to 75 not equal to the percent decrease from 75 to 45? Select three options.
Answer:
Step-by-step explanation:
The reason the percents are not the same is probably because you are finding percentage diffrences from diffrent numbers.
Answer:
A,C, and E
Step-by-step explanation:
I took the test
Pleaseee help answer correctly !!!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!
Answer:
108º
Step-by-step explanation:
to find the sum of interior angles: ( n − 2 ) × 180 = x
x = 540º
n = # of interior angles
first, solve for n
(n - 2) • 180 = 540 distribute to 180 to (n - 2)
180n - 360 = 540 add 360 to both sides
180n = 900 divide both sides by 180
n = 5
to find measure of each angle:
540 ÷ 5 = 108º
Please help! Will mark brainliest
Answer:
4(5)^2-5= 95
Hope this helps! :)
54 POINTS!!!!! PLEASE HELP LOL
Amber coaches soccer and volleyball. She coaches both sports for a total of 10 hours each day. The soccer practice lasts 1 hour more than twice as long as the volleyball practice.
Write a system of equations to model the situation. Use v for the number of hours Amber coaches volleyball in a day and s for the number of hours she coaches soccer
How many hours each day does Amber spend coaching each sport?
Show your work.
Answer:
10(1*2)+s
Step-by-step explanation:
7. Find the number of vertices of a polyhedron
having 10 faces and 12 edges
Answer:
4
Step-by-step explanation:
Using Euler's rule for polyhedra
F + V - E = 2 ( F - faces, V- vertices, E- edges )
10 + V - 12 = 2
V - 2 = 2 ( add 2 to both sides )
V = 4
9 hundred = how many 10's
Answer:
90
Step-by-step explanation:
900 is 90 tens
Check
900/10 = 90
or....
90 * 10 = 900
Hope this helped!
Have a supercalifragilisticexpialidocious day!
0.965 x 102 help me plz
98.43
May nilbin be with you
Answer:
0.965× 102= 98.43
This is right ans