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3 years ago

10

Which expression is equivalent to 1/2 x + (-70) - 2 1/4 x - (-2) *

1 answer:

katovenus [111]3 years ago

8 0

Answer:

-7/4x-68

Step-by-step explanation:

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Find the sum 2/8 - 7/11<br>argent pls

const2013 [10]

The answer you are looking for is -17/44

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2 years ago

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if the sum of a number and nine is doubled, the result is seven less than the number. find the number.

avanturin [10]

X=the number we have to find.
This expression "2(x+9)" is when the sum of a number and nine is doubled.
If the result is seven less than the number, we will have: x-7

We can suggest the following equation:
2(x+9)=(x-7)
2x+18=x-7
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2 years ago

What is the surface area of the sphere?

Fantom [35]

Answer:

<em>The surface area of the sphere is 314 mi².</em>

Step-by-step explanation:

According to the given diagram, the diameter of the sphere is 10 mi.

If the radius is $r$ , then diameter $=2r$

So....

$2r=10\\ \\ r=\frac{10}{2}= 5$

<u>Formula for the surface area of a sphere</u>: $A_{S}= 4\pi r^2$

Plugging the value of $r$ into this formula, we will get...

$A_{S}=4\pi(5)^2\\ \\ A_{S}=4\pi(25)\\ \\ A_{S}=4(3.14)(25)\ \ [Using\ \pi=3.14]\\ \\ A_{S}=314$

So, the surface area of the sphere is 314 mi².

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3 years ago

Urgent 50 points please put all the steps to finish

Anna71 [15]

$- 3x + y = - 2 \\y = 3x - 2$

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lbvjy [14]

All real numbers or is it multiple choice

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