O. días. m dificultad +1. +28. -56. -1 -9. x. 63+. +2

Mathematics

1 answer:

mihalych1998 [28]3 years ago

4 0

Answer:

-593

Step-by-step explanation:

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Mrs. Dobbs wants to replace the grass in her backyard and needs to find the area, in square feet, so she can purchase sod. The a

Dafna11 [192]

Answer: 158 square feet

Step-by-step explanation:

Area of the rectangle is; 128 feet

Area of the triangle is; 30 feet

Area of the triangle + area of the rectangle is; 158 square feet

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3 years ago

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3(2a + 1) = -5(a + 6)

Lemur [1.5K]

3(2a+1)=-5(a+6)
First expand the brackets.
6a+3=-5a-30
Now add 5a to both sides.
11a+3=-30
Then subtract 3 from both sides.
11a=-33
Finally divide both sides by 11.
a=- 33/11
=-3

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3 years ago

5 questions

zzz [600]

This is a comment---

Are you acually in middle school because this is algebra 2 and im learning this now in High school

4 0

2 years ago

In a free-fall experiment, an object is dropped from a height of h = 400 feet. A camera on the ground 500 ft from the point of i

PilotLPTM [1.2K]

Hmmm the object, is at rest, when dropped, so it has a velocity of 0 ft/s

the only force acting on the object, is gravity, using feet will then be -32ft/s²,

was wondering myself on -32 or 32.. but anyhow... we'll settle for the negative value, since it seems to be just a bit of convention issues

so, we'll do the integral to get v(t) then

$\bf \displaystyle \int -32\cdot dt\implies -32t+C
\\\\\\
\textit{object moves from \underline{rest}, so velocity is 0 at 0secs}
\\\\\\
-32(0)+C=0\implies C=0\implies \boxed{v(t)=-32t}
\\\\\\
\textit{now to get the positional s(t)}
\\\\\\
\displaystyle \int -32t\cdot dt\implies -16t^2+C
\\\\\\
\textit{the initial \underline{position} was 400ft away at 0secs}
\\\\\\
-16(0)^2+C=400\implies C=400\implies \boxed{s(t)=-16t^2+400}$

when will it reach the ground level? let's set s(t) = 0

$\bf s(t)=-16t^2+400\implies 0=-16t^2+400\implies \cfrac{-400}{-16}=t^2
\\\\\\
25=t^2\implies \boxed{5=t}$

part B) check the picture below

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2 years ago

-3(8n+10) <br> distributive property

Lerok [7]

-24n - 30, i suggest using math.way before asking a math question aha

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2 years ago

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