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3 years ago

Can someoone help me please (20 POINTS) ASAPPP

Mathematics

1 answer:

Vladimir79 [104]3 years ago

3 0

Answer:

does this let you retake it if so i think number one is the fourth one 3a^2b

Step-by-step explanation:

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A ball is launched into the sky at 54. 4 ft./s from a 268.8 m tall building. The equation for the ball’s height, h, at time t se

Crank

Answer:

t = 21

Step-by-step explanation:

The ball strikes the groujd when h = 0.

$-3.2t^2 + 54.4t+268.8=0 \\ \\ 32t^2 - 544t-2688=0 \\ \\ t^2 - 17t-84=0 \\ \\ (t-21)(t+4)=0 \\ \\ t=-4, 21$

Since time must be positive, t = 21.

6 0

2 years ago

What is the area of the two-dimensional cross section that is parallel to face ABC ?

Umnica [9.8K]

Answer:

The area of the two-dimensional cross section is $30\ ft^{2}$

Step-by-step explanation:

we know that

The two-dimensional cross section that is parallel to face ABC is a triangle congruent with the triangle ABC

Therefore

Calculate the area of triangle ABC

$A=\frac{1}{2}(BC)(AB)$

we have that

Triangles ABC and DEF are congruent

$BC=EF=12\ ft$

$AB=5\ ft$

substitute

$A=\frac{1}{2}(12)(5)=30\ ft^{2}$

8 0

3 years ago

Solve the systems equations for x and y and check:<br> y=2x+10<br> x=3y

andriy [413]

For Y=2x+10 X=y/2 -5. Second x/3

6 0

3 years ago

In equilateral ΔABC, AD, BE, and CF are medians. If FO = 4, then AE = A) 4 B) 4 3 C) 8 D) 12

vampirchik [111]

Firstly, we need to draw triangle

we know that

O is a centroid

and centroid divides median into 2:1

so,

$\frac{CO}{FO} =\frac{2}{1}$

we have FO=4

so, we can plug it

$\frac{CO}{4} =\frac{2}{1}$

$CO=8$

now, we can find CF

CF=OC+FO

CF=8+4

CF=12

now, we can see triangle ACF is a right angled triangle

so, we can use pythagoras theorem

$x^2=(\frac{x}{2} )^2+12^2$

now, we can solve for x

$\frac{3x^2}{4}=144$

$x^2=192$

$x=8\sqrt{3}$

Since, it is equilateral triangle

so,

$AC=x=8\sqrt{3}$

we know that

E is a mid-point

so,

$AE=\frac{AC}{2}$

now, we can plug values

$AE=\frac{8\sqrt{3}}{2}$

$AE=4\sqrt{3}$ ................Answer

5 0

3 years ago

Read 2 more answers

Phythagorean theorem help me plsss

marysya [2.9K]

Answer:

Step-by-step explanation:

We know that a^2+b^2=c^2 from the Pythagorean theorem where a and b are the legs and c is the hypotenuse

4^2+3^2 = c^2

16+9 = c^2

25 = c^2

Taking the square root of each side

sqrt(25) = sqrt(c^2)

5 =c

3 0

3 years ago

Read 2 more answers

Can someoone help me please (20 POINTS) ASAPPP​

Can someoone help me please (20 POINTS) ASAPPP