Answers
Answer:
2
Step-by-step explanation:
3x+10=31
-10 -10
3x=21
/3 /3
x= 7
Related Questions
105 calories in bananas. 75 calories in apples. If Mary only eats these fruits and her total calorie intake is 1215 how many of each fruit did she eat
Answers
Answer:
3 bananas and 12 apples.
Step-by-step explanation:
105b+ 75a = 1215 where b is number of bananas and a is number of apples.
Divide each number by 15:
7b + 5a = 81
5a must end in 5 or 10 so 7b must end in 1 or 6.
So we try:
21 and 60:
7 * 3 + 5 *1 2 = 81
So b = 3 and a = 12.
The solution is
The number of bananas is = 3 bananas
The number of apples is = 12 apples
What is an Equation?
Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given data ,
Let the number of apples be = a
Let the number of bananas be = b
Now , the equation will be
The number of calories in bananas = 105 calories
The number of calories in apples = 75 calories
The total calories Mary takes = 1215 calories
So ,
Total calories Mary takes = number of apples x number of calories in apples + number of bananas x number of calories in bananas
Substituting the values in the equation , we get
75a + 105b = 1215
Divide by 15 on both sides of the equation , we get
5a + 7b = 81
So , substituting the values of a = 12 and b = 3 , we get
5 ( 12 ) + 7 ( 3 ) = 81
60 + 21 = 81
81 = 81
Therefore , the vale of a is 12 and value of b is 3
Hence ,
The number of bananas is 3 bananas
The number of apples is 12 apples
To learn more about equations click :
https://brainly.com/question/19297665
#SPJ2
Helppp me due today brainiest to whoever is right
Answers
Answer:
x= 40.5
Step-by-step explanation:
4x+53=6x-28
-4x -4x
53=2x-28
+28 +28
81=2x
2 2
40.5=x
Hope this helps!
(brainliest please)
(multiple choice) plz help me!!
Answers
Ans=8
Step-by-step explanation:
...............................
Answer:
6edkruky4jeyenegnyejyehetngenegn
A sum yields an interest of Rs. 900 at 15% simple interest per annum in 4 years. Find the sum.
Answers
Answer:
15Step-by-step explanation:
P=I/RT = 900/15×4 =900/60 = 15
a) How many cars' speeds were recorded?
b) Estimate the median speed
c) Estimate the IQR speed
d) How many cars had a speed of 40km/hr or less?
Answers
2) 32 /speed
Can I please have help with this one
Answers
Answer:
The second line cuts the x-axis at x = -5/2.
Step-by-step explanation:
The given line:
[tex]3x-2y=12[/tex]
Intersects a second line at x = 2.
This second line is perpendicular to the first.
And we want to find the second line's x-intercept.
First, rearrange the first line into slope intercept form:
[tex]-2y=-3x+12[/tex]
So:
[tex]\displaystyle y=\frac{3}{2}x-6[/tex]
We can see that the slope of the first line is 3/2.
It intersects the second line at x = 2.
So, the y-value of both the first and second line at x = 2 is the same.
Find the y-value by using the first line:
[tex]\displaystyle y=\frac{3}{2}(2)-6=3-6=-3[/tex]
So, a point on both lines is (2, -3).
Since the second line is perpendicular to the first, its slope it the first's negative reciprocal.
The negative reciprocal of 3/2 is -2/3.
So, the slope of the second line is -2/3.
And we determined that it passes through (2, -3).
Then by the point-slope form:
[tex]y-y_1=m(x-x_1)[/tex]
Substitute:
[tex]\displaystyle y-(-3)=-\frac{2}{3}(x-2)[/tex]
Distribute:
[tex]\displaystyle y+3=-\frac{2}{3}x+\frac{4}{3}[/tex]
So:
[tex]\displaystyle y=-\frac{2}{3}x-\frac{5}{3}[/tex]
The second line will cut the x-axis when y = 0.
So:
[tex]\displaystyle 0 =-\frac{2}{3}x-\frac{5}{3}[/tex]
Multiply both sides by -3:
[tex]0=2x+5[/tex]
Solve for x:
[tex]\displaystyle x=-\frac{5}{2}[/tex]
The second line cuts the x-axis at x = -5/2.
1/3(c) when c = 64. What’s the answer using PEMDAS
Answers
Answer:
21.3 repeated
Step-by-step explanation:
Let's look at our equation
1/3c
We also have the number that c stands for, which is 64, so what we must do is replace c with 64.
1/3(64)
Now we have the equation 1 over 3 multiplied by 64, so multiply as is.
64 * 1 = 64
Therefore,
64/3
Now divide :
21.3 repeated
Asap
Each part needs fourteen small holes drilled in its outer surface and four larger holes drilled in its inner surface. Write an expression that shows how many holes need to be drilled for c parts.
Answers
Answer:
(14 + 4)c, or 18c
Step-by-step explanation:
Answer:
(14 + 4)c, or 18c
Step-by-step explanation:
Geometry please help!
7. Kite
x = _ y = 146
Answers
simplify these expressions: 12x - 3x
Answers
Answer:
12x-3x
= 9x
Step-by-step explanation:
Hope it is helpful....
HHHHEEELLPPPP MEEEEEEEEE PLZZZZ
Answers
Answer:
c
Step-by-step explanation:
mabye not but meh
for the pairs below put each question in slope intercept form and whether the graphs of the line will be identical, parallel, or intersecting, Also determine how many solutions the system of equations will have
Answers
Both equations are now y = 3x + 2. So they are identical, and therefore have infinite solutions since solution means how many times do these lines meet/overlap.
4: rewrite left-right and the equations are now:
y = -x
y = -x -2
Same slope but different intercept (b value), so they are parallel and NEVER meet (NO SOLUTIONS)
5. Rearrange:
y = -x + 4
y = x + 4
So they have different SLOPES in this example (m value). This means they are not parallel or identical, so they can only cross once (one solution)
6: rearrange both
y = 3x - 1
y = 3x + 1
Same slope (m=3), different intercepts (b= 1 and -1). Same slope means parallel, different b means different intercepts so they are NOT identical. Since parallel lines can not cross, there are no solutions
7: y = 2x + 4
y = 2x - 4
Same slope (m=2), different b values (y-intercepts are 4 and -4), so parallel but not identical, no solution
3 times the sum of a number w and 5
Answers
Answer: 3× (w +5)
Step-by-step explanation:
5/8 + 5/6 = ? ( Simplfy It)
Answers
Answer:
1 11/24
Step-by-step explanation:
30/48+40/48=70/48=1 11/24
Answer:
15/24 + 20/24 = 35/24 = 1 11/24
Step-by-step explanation:
because 6 and 8 lcm = 24 soooo
5x4 + 5x3 = 20 + 15 = 20/24 + 15/24
which is 35/24 which equals 1 11/24
hope it helps :>
Find the value of the variables for the given special parallelogram.
Answers
Step-by-step explanation :
Evaluate 3√343 + 3/4 3√-8
Answers
Answer:
5 1/2 is the answer, hope this helps
3 +(-0.2)-15 1/4 plz help guys
Answers
Answer:
-12.45
Step-by-step explanation:
Answer:
the answer is -12.45
Find the area...
HURRY!!!!!
Answers
Answer: 38
Step-by-step explanation:
show work please i will give brailiest show work pls
2 - 1 + 5 x 4 x 11
14 ÷ 2 -1 + 3
3 x 8 x 2 – 42 + 5
Answers
5x4=20
2-1+20x11
20x11=220
2-1+220
2-1=1
1+220=221
2. 14/2-1+3
14/2=7
7-1+3
7-1=6
6+3=9
3. 3x8x2-42+5
3x8=24
24x2-42+5
24x2=48
48-42+5
48-42=6
6+5=11
Write the following equation in standard form: x^5 + 2x^3 +6x + 1/5
Answers
Answer:
it already is in standard form
Step-by-step explanation:
Hi guys can you answer my math question
Answers
Answer:
square and what does the picture look like
Step-by-step explanation:
Use the strategy you developed i
a. a/7 + a/3 = 10
Answers
Answer:
A=21
Step-by-step explanation:
a/7 + a/3 = 10
3a/21+7a/21=210/21
3a+7a=210
10a=210
a=21
Help me with this please??????????
ABCF is a rectangle.
CDEF is a trapezium.
AE is a straight line.
AB = 9 cm, AE = 11 cm and DE = 5 cm.
The perimeter of rectangle ABCF is 28 cm.
Calculate the area of trapezium CDEF.
F
с
11 cm
А
9 cm
B
+
I
Answers
Answer:
42cm^2
Step-by-step explanation:
are u in a test ;-;
two width is 28-9*2=10
width=5
ef=trapezium height=6
traqiuzm area=(5+9)*6/2
ANSWER IS 42
Solve this system of equations:
y=-3x + 13
y=-2x + 1
Enter your answer as an ordered pair (x, y).
Answers
Answer:
The answer is (12,-23)
I really don’t get how to do this. It’s really confusing me! I really need help, if anyone can answer this it’ll be much appreciated
Answers
plz help!
Find the missing angle measurements.
60°
64°
45°
49°
53°
Answers
Answer:
45° 60° 64°
Step-by-step explanation:
Little triangle:180-(64+71)=45
Big triangle :180-(64+56)=60
Answer:
The big triangle is 60, the little triangle is 45, and the middle is 64.
Step-by-step explanation
make me brainliest
Find the measure of each angle indicated. Round to the nearest tenth.
Answers
Answer:
theta = 22.6 degrees
Step-by-step explanation:
Here, we want to find the value of theta
To do this , we use the appropriate trigonometric identity
Let us identify the given sides of the triangle
we have the hypotenuse, which is the longest side of the triangle, given as 13 and the third side called the adjacent, given as 12
The trigonometric identity that relates the hypotenuse to the adjacent is the cosine
Mathematically;
cosine of an angle is the ratio of the adjacent to the hypotenuse
Thus, we have it that;
cos theta = 12/13
theta = arc(cos) 12/13
theta= 22.6
1. Solve for x
x + 1 = 6
Answers
Answer:
5
Step-by-step explanation:
Plz mark brainliest
Answer:
5
Step-by-step explanation:
At the zoo, Peter saw 9 animals. Some are kangaroos and some are
elephants. There are 30 legs in all. How many of each animal are there?
Answers
Answer:
6 elephants and 3 kangaroos in the zoo.
Step-by-step explanation:
Number of animals = 9
Number of legs seen = 30
But an elephant has 4 legs, while a kangaroo has 2 legs.
Let the number of elephant be represented by E, and the number of kangaroo by K.
So that,
E + K = 9 .................. 1
4E + 2K = 30 ............. 2
Multiply equation 1 by 2 to have
2E + 2K = 18 ............ 3
Subtract equation 3 from 1
2E = 12
E = 6
Substitute the value of E in equation 1
E + K = 9
6 + K = 9
k = 3
Thus, there were 6 elephants and 3 kangaroos in the zoo.
I need help with this