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2 years ago

Mari is adding (-7) and (-2). She adds their absolute values and says the answer is 9.

Mathematics

1 answer:

Helen [10]2 years ago

5 0

Answer:

ari is adding (-7) and (-2). She adds their absolute values and says the answer is 9.

What did Mari forget?

that is neither positive nor negative

to move left on the number line

to keep the sign of the larger integer

to keep the sign of the two integers being adde

Step-by-step explanation:

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Solve inequality algebraically 3|x +2|+7<43

NNADVOKAT [17]

Answer:

x<10 and x>−14

Step-by-step explanation:

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3 years ago

PLEASE HELP!

makvit [3.9K]

Answer:

Step-by-step explanation:

diameter = 12 cm

r = 12 ÷ 2 = 6 cm

h = 6 cm

$\sf \boxed{\text{\bf Volume of cone = $\dfrac{1}{3} \pi r^2h$ }}$

$\sf = \dfrac{1}{3}*3.14*6*6*6\\\\ = 226.08 \ cm^3$

To find the surface area, we need to find the slant 'l'

$\sf l = \sqrt{h^2+r^2}\\\\ =\sqrt{6^2+6^2}\\\\ = \sqrt{36+36}\\\\ =\sqrt{72}\\\\= 8.49 \ cm$

$\sf \boxed{\text{\bf Total surface area of cone = $\pi r(r+l)$}}$

= 3.14 * 6 * (6 + 8.49)

= 3.14 * 6 * 14.49

= 273 cm²

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1 year ago

The problem is how many people must attend the third show so that the average attendance for three shows is 3000? And the other

Akimi4 [234]

An average is just the total attendance numbers / the number of performances.

Let's let the number of people in the third show be equal to x so we can write this as a formula, it's easier to read. x is just "some number we don't know"

The average is

Average=Total attendance/3
So
3000=(2580+2920+x)/3

So let's multiply by that 3 on both sides, make x easier to find

Average*3=2580+2920+x ( * means multiplied)

The average is 3000

So

2580+2920+x=3000*3
2580+2920+x=9000

Then we subtract those other attendances to get x on its own.

x=9000-2580-2920
x=3500

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3 years ago

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