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3 years ago

Can someone help me plz I will make brainliest. For correct answers only

Mathematics

1 answer:

Licemer1 [7]3 years ago

4 0

Answer:

It's the 3rd one: Commutative Property of Equality.

Step-by-step explanation:

Original: 3a + 6 = 2 - 5a + 7

But then on step one, the -5a was moved around. The -5a took the position of where the +7 was located and the +7 took the position of where the - 5a was located. (Basically, they switched)

Step one: 3a + 6 = 2 + 7 -5a

<h2>(I really hope this helps.)</h2>

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3 years ago

A tire company finds that the lifespan for one brand of its tires is normally distributed with a mean of 47,500 miles and a stan

Illusion [34]

Answer:

42580 miles

Step-by-step explanation:

Mean = $\mu = 47500$

$\sigma = 3000$

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$P(X\leq x)=5\%$

$P(\frac{x-\mu}{\sigma}\leq \frac{x-47500}{3000})=0.05$

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Hence the approximate number of miles for the warranty is 42580 miles

6 0

3 years ago

Help and I will make you a brainllest

ahrayia [7]

Answer:

yes

Step-by-step explanation:

Hope this helps:)

3 0

3 years ago

Read 2 more answers

A cylindrical piece of iron pipe is shown below. The wall of the pipe is 0.75 inch thick, and the pipe is open at both ends:

Gnesinka [82]

Answer:

(A)398 cubic inches

Step-by-step explanation:

Given a cylindrical piece of iron pipe with the following dimensions:

Height = 12 inches
Diameter = 8 inches

Therefore: External radius =4 Inches

Since the wall of the pipe is 0.75 inch thick,

Internal Radius =4-0.75 =3.25 Inches

Volume of a Cylinder = $\pi r^2 h$

Inside Volume of the Pipe

$= \pi*3.25^2*12\\=398$ cubic inches$

The correct option is A.

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3 years ago

If ray earns $120 for 15 hours of work, how much will he earn for 20 hours of work at the same rate

ss7ja [257]

Find his rate:

120 / 15 = $8 per hour

Multiply the rate by hours:

$8 x 20 hours = $160

He will earn $160

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3 years ago