Answer:
99 books in total...
Step-by-step explanation:
A student took a system of equations, multiplied the first equation by 2 and the second equation by 3, then added the results together. Based on this, she concluded that there were no solutions. Which system of equations could she have started with?
1) 2x-4y=6
3x+6y=9
2) 3x+y=12
-3x+6y=6
3) -2x+4y=4
-3x+6y=6
4) 3x+6y=9
-2x-4y=4
Answer:
system 4.
Step-by-step explanation:
3x+6y=9
multiply by 2
6x+12y=18 ....(1)
-2x+-4y=4
multiply by 3
-6x-12y=12 ...(2)
add (1) and (2)
0+0=30
which is impossible .It has no solutions.
Answer:4) 3x+6y=9-2x-4y=4
Step-by-step explanation:
I got the answer right
Question 1) Use the linear combination method to solve the system of equations. Explain each step of your solution. 2x - 3y = 13, x + 2y = -4. ( I'll post a picture of the question and problem incase there's any confusion). Will Mark Brainliest.
Answer:
x = 2 and y = -3
Step-by-step explanation:
The given equations are:
2x - 3y = 13 ...(1)
x + 2y = -4 ...(2)
Multiply equation (2) by 2.
2x + 4y = -8 ...(3)
Subtract equation (3) from (1).
2x - 3y-(2x + 4y) = 13-(-8)
2x-3y-2x-4y = 13+8
-7y = 21
y = -3
Put the value of y in equation (2).
x + 2(-3) = -4
x-6=-4
x = 6-4
x = 2
So, the solution of the given equations are x = 2 and y = -3.
Enter an equation for the function. Give your answer in the form a(b)n. In the event that a = 1, give your answer in the form (b)n.
A pharmaceutical company is testing a new antibiotic. The number of bacteria present in a sample when the antibiotic is applied is 11000. Each hour, the number of bacteria present decreases by half. The number of bacteria remaining r(n) is an exponential function of the number n of hours since the antibiotic was applied.
the equation is r(n) = _____
Answer:
5757
Step-by-step explanation:
Please help cause my class over in a few mins please hurry
Answer:
3x+4
Step-by-step explanation:
just combine like terms
x+2x= 3x
3+1=4
HELPPP
8g + 25 = 97
Solve for G
Answer: 120 g
Step-by-step explanation:
Determine the ratio of shaded sections to striped sections. Then explain its meaning.
Answer:
Determine the ratio of shaded sections to the total number of sections. Write the ratio as a fraction in simplest form and as a decimal.
Answer:
3/8
Step-by-step explanation:
Total no. of sections= 8
No. of shaded sections= 3
Therefore, the ratio = 3/8
the cost of New York Yankees baseball cap is 24.00. The local sporting goods store sells it for $30.00. markup rate
Can anyone help me with this please....
[tex]2 \sin2x - \sin(x) . \sqrt{2ctgx} = 1[/tex]
2× - sin (×), √2xtg × ≈ 1 =
-7 es numero natural?
Answer:
no no es un numero natura,los numeros naturales son los que estan completos como el 1 el 2 el 3 y mas numeros los que son menos o con punto decimal no lo son
The dot plots below show the age of some dance students and some yoga students: Two dot plots are shown one below the other. The top and the bottom plots have the title Dance Students and Yoga Students respectively. Below the line for each dot plot is written Age followed by years in parentheses. The markings on each line are from 10 to 30 at intervals of 1. For the top plot there are two dots for 13 and 16 and 1 dot each for 12, 15, 17, 18, and 20. For the bottom plot there are 2 dots for 25 and 1 dot each for 17, 19, 20, 22, 24, 27, and 29. Based on visual inspection of the dot plots, which group of students appears to have the larger average age? The yoga students The dance students Both groups are similar. Not enough information is available to draw a conclusion.
Answer:
The yoga students
Step-by-step explanation:
This one is kinda easy but i took the test and got it right have a good day! :)
Answer:
yoga students
Step-by-step explanation:
i did the math in math class for this question lol.
1 box contains 23 crayons then______6 box will have crayons
Answer:
138 crayons
Step-by-step explanation:
1 box is 23
6x23 is 138
Which is the value of the expression? (-2) to the fourth power
A. -16
B. -8
C. 8
D. 16
Answer:
Variant D
Step-by-step explanation:
-2*(-2)*(-2)*(-2)=16
Find the product. 5/8 of 24 A. 8 B. 15 C. 11 D. 9
Answer:
15 = B
Step-by-step explanation:
5/8 x 24 = 15
Step-by-step explanation:
5/9×24
5/8×24
[tex] \frac{5 \times 24}{1 \times 8} [/tex]
[tex] \frac{120}{8} [/tex]
B.15
hope it's helpful ❤❤❤❤
THANK YOU.
Plz I need help with these two
Answer:
x<=2
11>=x
Step-by-step explanation:
x+14<=16
x<=2
One number is 3 times as large as another. Their sum is 28. Find the numbers
Answer
7
Step-by-step explanation:
please help appreciate it!!
Answer:
I only
Step-by-step explanation:
It is the only one that passes through both.
Desmos is a great graphing calculator
Answer:
the is answer is neither
Step-by-step explanation:
i also used desmos and i got neither.
A kingfish needs to be cut into 8-ounce pieces. If the fish weights 12.5 pounds, how many pieces can be cut? 1 pound=16 ounces
Answer:
25 pieces
Step-by-step explanation:
12.5 * 16= 200 ounces
therefore 200/8=25
Geometry Will give Brainlist
Given :
segment AE and segment BD bisect each otherWhich means :
∠BCA and ∠DCE are equal because they are vertically opposite angles. Segment AC = segment CE because the bisector BD divides the segment AE into two equal parts which are segment AC and segment CE.segment BC and segment CD will be equal because bisector AE divides the segment BD into two equal parts which are segment BC and segment CD.Since two sides and one included angle is equal △ACB≅△ECD under the SAS congruence criterion .
Geometry only answer if you know, Need help
These triangles are congruent under the SAS congruence criterion. The angles that face each other at the tip of these two triangles are vertically opposite angles, so their measures will be equal. It is already given that two sides of these two angles are equal. Since two sides and one included angle is equal, the SAS congruence criterion can be used to prove that this triangle is congruent.
Answer (b) :These triangles are congruent under the SSS congruence criterion. This criterion states that if all three sides of two triangles are equal then they are congruent triangles. Since two sides and one included/common side of these triangles are equal they can said to be congruent under the SSS congruence criterion.
Answer (c) :These triangles can be proved to be congruent using the SAS congruence criterion. Let us prove it using the following steps :
Given :
In triangle 1 :
Measure of an angle = 48°Measure of one of its side = 6 cmMeasure of another side = 6 cmIn triangle 2 :
Measure of an angle = 48°Measure of one it's side = 6 cmMeasure of another side = 6 cmSince two sides and one included angles of both these triangles are equal, we can conclude that they are congruent under the SAS congruence criterion.
Answer:
lady strange is the best
Step-by-step explanation:
(2a+5a²)+(2a-a²)
cual es el resultado
[tex]4a + {4a}^{2} [/tex]
Step-by-step explanation:
1) Remove parentheses.
[tex]2a + {5a}^{2} + 2a - {a}^{2} [/tex]
2) Collect like terms.
[tex](2a + 2a) + ( {5a}^{2} - {a}^{2} )[/tex]
3) Simplify.
[tex]4a + {4a}^{2} [/tex]
Therefor, the answer is, 4a + 4a².
HELP IM GIVING 20 POINTS LIKE PLZZ I NEED HELP
Answer:
price = 4.1
cost = 12.3
Step-by-step explanation:
price = 0.8+1.2+1.5+0.6 = p4.1
cost = 2.40+3.60+4.50+1.80 = $12.3
Write the equation of the line that passes through the points (-1, 10) and (5, 2)
Answer:
[tex]y=-\frac{4}{3}x +\frac{26}{3}[/tex]
Step-by-step explanation:
1) if the point A has coordinates (-1;10) and the point B - (5;2), then it is possible to write common view of the required equation of the line:
[tex]\frac{x-X_A}{X_B-X_A} =\frac{y-Y_A}{Y_B-Y_A};[/tex]
2) if to substitute the coordinates of A&B into the common equation, then:
[tex]\frac{x+1}{5+1} =\frac{y-10}{2-10}; \ => \frac{x+1}{6}=\frac{y-10}{-8};[/tex]
3) finally, in slope-intersection form:
3y= -4x+26; ⇔ y= -4/3 x +26/3.
P.S. the suggested way of the solution is not the only one.
Tom bought a television and paid of the original price, including tax. The original price of the television was $500. How much change did
Tom receive if he paid the cashier $400?
A $25
B. $50
o C. $75
D. $150
The answer isn't in A. B. C. or D.
Step-by-step explanation:
The answer would be negative or not be in the answer list.
What the answer please!!!!
Answer:
a
Step-by-step explanation:
The sum of an equation is 45/100
One addend is 4/10
What is the missing addend?
Answer:
The missing addend is 1/20
Step-by-step explanation:
Variable x: missing addend
4/10 + x = 45/100
When adding or subtracting fractions, the denominators must be the same number.
To convert 10 to 100, we must multiply 10 by 10.
If we multiply 10 to the denominator, we must do the same to the numerator (multiply by 10).
4 × 10 / 10 × 10
40/100
Use this fraction in the equation now
40/100 + x = 45/100
Now isolate the variable, x, by subtracting 40/100 from both sides
40/100 - 40/100 + x = 45/100 - 40/100
When subtracting fractions, only subtract the numerators. The denominators remain the same
x = 5/100
Simplify 5/100
Both numbers can be divided by 5
5 ÷ 5 / 100 ÷ 5
1/20
what is the sum of 1/8 + 5/16 + 3/8
Answer:
0.8125
Step-by-step explanation:
because i did the process
Answer:
0.8333333 or 13/16
Step-by-step explanation:
Earth is 92.96 million miles from the su orbits the sun in about 365, 26 days traveling at an average speed of 18.51 miles per secondHow far does Earth travel in minute(60 seconds)
Answer:
multiply the time and speed the divide the distance with the value of a minute.
Step-by-step explanation:
365 x 26 x 18.52 = 175,754.8 divided by 60 = 2,929.246666666667
simplify into 2,929.2
16. A photograph is reduced to 75% of its original size. The photo was originally 96 squaro Inches. What is
the now area after it has boon reduced?
Answer:
mom clock usualli a h i j o
Which point could be on the line that is parallel to line KL and passes through point M?
(–10, 0)
(–6, 2)
(0, –6)
(8, –10)
Answer:
D. (8, –10)
Step-by-step explanation:
(8, -10) passes through this line.
The correct option is D
What is Coordinate Geometry?
By using graphs with curves and lines, coordinate geometry (also known as the analytic geometry) explains how geometry and algebra are related.
As per the given data:
We are given a line KL in the diagram, and we have to find out which point out of the given options will satisfy the equation of the line which is parallel to KL and passes through M.
Using the intercept form equation of line KL:
x/a + y/b = 1 [a and b are x and y intercepts respectively]
x/6 + y/4 = 1
4x + 6y = 24
Slope of this line = -a/b = -4/6 = -2/3
The line parallel to this will have the same slope and should pass through (-4, -2)
y - (-4) = (-2)/3 [x - (-2)]
y + 4 = (-2/3)[x + 2]
3y + 12 = -2x - 4
2x + 3y + 14 = 0
Clearly (8, -10) passes through this line.
2(8) + 3(-10) + 14 = 0
Hence, (8, -10) passes through this line.
To learn more about Coordinate Geometry, click:
brainly.com/question/7869125
#SPJ7
A 13 foot board is cut into 2 pieces, if one piece is x feet long express the other length in terms x
Answer:
if they are equal then it would be 6.5