Need help plz. last two parts of a 80 question homework

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Answer 1

Answer: 72. first multiply 1 1/2 by 2 and you get 3 for 6 dozen, then add 1/2 and you get 3 and 1/2 for 7 dozen.
73. 3+2 is 5, and 2 is 66% of 3, so it is a 66% increase
74. 495 X .07 is 34.65, so she gets $34.65 dollars
75. multiply 7/100 by 40 to get 280/4000, so 280 would be defective

I can not read the last 4 questions

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3x-2(5-x)=-3(x-10)+3x show work

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This is what I got! I’m a lil rusty.

3x-2(5-x)=-3(x-10)+3x

3x-10+2x=-3x+30+3x
5x-10=30
5x=40
x=8

Negitive 12 square root of 12 minus 2 square root of 3A -50 squareroot of 3
B -22 squareroot of 3
C -26 squareroot of 3
D -10 squareroot of 3

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You said . . . -12√12 - 2√3 .

Before we get all tangled up trying to work on the whole thing at once,
take a look at that first square root: √12 .

That's the same thing as √(4 · 3) and you can break it up like this:

√(4 · 3) = √4 · √3 .

Now, we know what √4 is . . . it's just 2 .

So we can write the first half of your original big quantity like this:

-12 √12

= -12 · 2 · √3

= -24√3 .

NOW, finally, let's go back and rewrite the whole thing:

-24√3 - 2√3 .

Isn't that a lot nicer looking ?
It's nearly solved all by itself ... if you don't let the √3 scare you.

It just says -24(cows) - 2(cows) .
and everybody knows, that's just -26(cows).

So -24√3 - 2√3 is just -26√3 . (choice-C)

Write an equivalent expression for n x a using only addition

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little more details. please

How to do the circumference of a circle

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The formula is C= $\pi$ d.

C=3.14•diameter
C is circumfrence

Which on these time measurements is the smallest?

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Seconds because one second is less than one minute

What is the reciprocal of (1/7)?

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Answer:

0.14285714285

Step-by-step explanation:

pls mark as brainliest!!!

Answer:
7

Explanation:
The reciprocal of a number is to switch the numerator and denominator. In (1/7), the numerator is 1 and the denominator is 7. A fraction is always numerator/denominator. So, when (1/7) is flipped, the fraction’s reciprocal is (7/1) which is simplified to 7.