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mr Goodwill [35]

3 years ago

10

The equation $y = -16t^2 + 80t$ describes the height (in feet) of a projectile launched from the ground at 80 feet per second. A

t what $t$ will the projectile reach 36 feet in height for the first time? Express your answer as a decimal rounded to the nearest tenth.

1 answer:

Salsk061 [2.6K]3 years ago

4 0

Hhhhhfgvbxgkkifdxxdxfghjiji

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Which graph shows the solution to the equation 4x-4=4?

Mama L [17]

Answer:

A

Step-by-step explanation:

y = 4x - 4 is a line with y-intercept -4 and slope 1. Both graphs A and C show that line in blue.

y = 4 is a horizontal line through y = 4. Graph A shows that line.

Answer: A

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3 years ago

Which form of democracy does the United States have?

Vaselesa [24]

B is the correct answer
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Karina is creating two pyramids with the nets below using construction paper. In both nets, all of the triangular faces of the p

sleet_krkn [62]

Answer:

144 sq in

Step-by-step explanation:

Face height=9, bases=6 in

#Assume the pyramid has a square base.

First we need to calculate the perpendicular height of the pyramid:

$#Pythagorean \ Theorem\\a^2+b^2=c^2\\9^2-(0.5\times 6)^2=h^2\\72=h^2\\h=\sqrt{72} \ in$

Now to find the surface area of each pyramid:

$A=lw+l\sqrt{(w/2)^2+h^2}+w\sqrt{(l/w)^2+h^2}\\\\\#w=l=6,h=\sqrt{72}\\\\A=6^2+6\sqrt{(6/2)^2+72}+6\sqrt{(6/6)^2+72}\\\\A\approx 144\ sq \ in$

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3 years ago

Solve 3x/2 - 7=x/4 - 2 i know the answer is 4 but how do i solve this

Digiron [165]

First, multiply by 4 on both sides to eliminate the denominator, and you get...
6x-28 =x-8
Subtract x on both sides and add 28...
5x=20
Divide to isolate the variable...
x=4
Hope this helps

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I need this answer asap! Thanks, See attached image bellow. <br> 40+ points!

Wewaii [24]

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Step-by-step explanation:

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