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Xelga [282]
3 years ago
13

Quick anyone know the answer to this?

Mathematics
1 answer:
nata0808 [166]3 years ago
4 0
The top question is B. 30, because you have to set 7y-30 equal to 4y+60 since both lengths are the same.
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How do you determine which place value to use when estimating products?
Shkiper50 [21]
Which ever on is on the whole side of the side of the decimal...or in other words, what ever number is on the left side of the decimal
8 0
3 years ago
A rectangle has perimeter 20m. Express the area of the rectangle as a function of the length of one of its sides.
MArishka [77]
<h2>Area of rectangle is 10L-L²</h2>

Step-by-step explanation:

Let L be the length and W be the width.

Perimeter of rectangle = 2 ( L + W )

That is

           2 ( L + W ) = 20

               L + W = 10

                     W = 10 - L

We need to express the area of the rectangle as a function of the length of one of its sides.

           Area = Length x Width

              A = LW

               A = L(10 - L) = 10L-L²

Area of rectangle is 10L-L²

7 0
3 years ago
7. What is the slope of the line that passes through the pair of points (3, 8) and (9, 5) ? (1 point)
agasfer [191]
7. D
8. D
9. D
10.C

for 7 & 8 you use the equation
\frac{y2 - y1}{x2 - x1}
your points are (3,8) & (9,5)

so you plug the numbers in
y2= 5
y1=8

x2=9
x1=3
you subtract them get a fraction and that is your slope


9 & 10
use the equation
y - y1 = m(x - x1)
plug you numbers in for y1 and x2 m is your slope plug it in and that is your equation


5 0
3 years ago
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Find the value of h .
MariettaO [177]

Answer:

xowowo2o2oeoddoxxocckckcll

6 0
3 years ago
A toy cannon ball is launch from a cannon on top of a platform the equation h(t)= -5t + 14t + 2 gives the height h, in meter, of
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Answer:

<h2>how long air in the earth ok good</h2>
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3 years ago
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