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2 years ago

WHAT IS THE ANSWER 9x-13 for x=7

Mathematics

1 answer:

PtichkaEL [24]2 years ago

3 0

Answer:50

Step-by-step explanation:

Plug 7 in for x

Multiply 9 by 7

Solve like normal equation

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The percent increase in the iron was 50%. 1.2/2 = .6 1.2 + .6 = 1.8

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2 years ago

Please help it's the SLOPE

Maksim231197 [3]

Answer:

$- \frac{4}{5}$

Step-by-step explanation:

Please see the attached picture.

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2 years ago

There is small pond which is 8 metres long, 4metre wide and 2metre deep what is the volume

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2 years ago

Which ordered pair is a solution of the equation ?

Gekata [30.6K]

Answer:

C. Both of the above answers

Step-by-step explanation:

13 = -6(-2) + 1

13 = 12 + 1

13 = 13

7 = -6(-1) + 1

7 = 6 + 1

7 = 7

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2 years ago

Find the volumes of the solids generated by revolving the triangle with vertices (2, 2), (2, 6), and (5, 6) about a) the x-a

Vesna [10]

About the $x$ -axis (washer method):

$\displaystyle\pi\int_2^5\left(6^2-\left(\frac43x-\frac23\right)^2\right)\,\mathrm dx=\frac{16\pi}9\int_2^5(20+x-x^2)\,\mathrm dx=\boxed{56\pi}$

About the $y$ -axis (shell method):

$\displaystyle2\pi\int_2^5x\left(6-\left(\frac43x-\frac23\right)\right)\,\mathrm dx=\frac{8\pi}3\int_2^5x(5-x)\,\mathrm dx=\boxed{36\pi}$

About $x=7$ (shell method):

$\displaystyle2\pi\int_2^5(7-x)\left(6-\left(\frac43x-\frac23\right)\right)\,\mathrm dx=\frac{8\pi}3\int_2^5(35-12x+x^2)\,\mathrm dx=\boxed{48\pi}$

About $y=2$ (washer method):

$\displaystyle\pi\int_2^5\left((6-2)^2-\left(\frac43x-\frac23-2\right)^2\right)\,\mathrm dx=\frac{16\pi}9\int_2^5(5+4x-x^2)\,\mathrm dx=\boxed{32\pi}$

7 0

2 years ago