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3 years ago

PLEASE HELP QUICK!!!!!!1

Mathematics

2 answers:

Lana71 [14]3 years ago

4 0

volume of pyramid = 1/3(area of the base)(height)

volume = 1/3(8x6)(9) = 3x48 = 144 in^3

answer: 144 in^3

AysviL [449]3 years ago

4 0

Answer:

144

Step-by-step explanation:

8*6*9 divided by 3 is how you find the volume

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3q + 3j <br>if q= 7 and j = 4

Flura [38]

Answer:

Step-by-step explanation:

3q + 3j

if q= 7 and j = 4

3(7) + 3(4) = 21 + 12 = 33

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2 years ago

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Elza [17]

The domain is y >=0. Domain is the possible x values

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3 years ago

Keira's older cousin earns $700 a week. Recently he moved into his own apartment. What amount of debt do you think is reasonable

umka21 [38]

Answer:

10,000

Step-by-step explanation:

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2 years ago

A ball is thrown directly up in the air from a height of 5 feet with an initial velocity of 60 ft/s. Ignoring air resistance, ho

Mice21 [21]

Answer:

3.8 seconds

Step-by-step explanation:

Given equation

$h= -16t^2 + 60t + 5$

When the ball hits the ground then height is 0

So we replace h with 0 and solve for t

$0= -16t^2 + 60t + 5$

a= -16 , b= 60 and c= 5

Apply quadratic formula to solve for t

$t=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

= $\frac{-60+\sqrt{60^2-4\left(-16\right)\cdot \:5}}{2\left(-16\right)}[/tex[tex]=\frac{-60+-\sqrt{3920}}{-32}$

$=\frac{-60+-28\sqrt{5}}{-32}$

$=\frac{4(-15+-7\sqrt{5})}{-32}$

$=\frac{(-15+-7\sqrt{5})}{-8}$

Now make two fractions and solve for x

t= $-\frac{7\sqrt{5}-15}{8}$ =-0.0815

t= $\frac{7\sqrt{5}+15}{8}$ =3.83

So answer is 3.8 seconds

4 0

2 years ago

Solve x2 - 8x = 3 by completing the square. Which is the solution set

Simora [160]

Answer:

4\pm\sqrt{19}

Step-by-step explanation:

Move everything to left side

$x^{2} -8x -3 =0$

Now to solve this square equation we need to find Descriminant

$D=b^{2} -4ac=64+12=76$

As Descriminant D is greater than 0 then we have 2 solutions which we can calculate by this formula

$x_{1,2}=\frac{-b\pm\sqrt{D}}{2a} =\frac{8\pm2\sqrt{19}}{2}=4\pm\sqrt{19}$

3 0

2 years ago