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3 years ago

Please help!! Will mark first answerer brainiest!! Thank you so much!

Mathematics

2 answers:

Mrac [35]3 years ago

8 0

The answer is C i believe, always remember to add alike terms.

Ksenya-84 [330]3 years ago

5 0

First distribute -5 to everything in the parentheses:

-15m^3 -35n^2

And simplify like terms:
-35n^2 + 8n^2 = -27n^2

Answer:
-15m^3 - 27n^2

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What is the mass of a 15cm cube of lron if density of iron is 78grams/cm

amm1812

Answer:

M = 1170 g

Step-by-step explanation:

Mass = density × volume

M = p x v

M = 78 x 15

M = 1170 g

3 0

2 years ago

Read 2 more answers

The volumes of two cylindrical cans of the same shape vary directly as the cubes of their radii. If a can with a six-inch radius

Cerrena [4.2K]

Answer:

The second similar can with a radius of 24-inch radius will hold 12 gallons

Step-by-step explanation:

The given parameters are;

The volumes of the cylindrical can ∝ (The radius of the cans)³

The volume of first can, V₁ = 1¹/₂ pints

The radius of the first can, r₁ = 6-inch

The radius of the second can, r₂ = 24-inch

Therefore, we have;

V ∝ r³

V = k × r³

∴ 1¹/₂ pints ∝ (6 in.)³

1¹/₂ pints = 43.3125 in³

∴ 43.3125 in³ = k × 216 in.³

The constant of proportionality, k = 43.3125/216 = 0.2005208333

Therefore, we have for the second can, we have;

V₂ = k × r₂³ = 43.3125/216 × (24 in.)³ = 2772 in.³

The volume of the second can = 2772 in.³

1 in.³ = 0.004329 gallons

∴ 2772 in.³ = 2772 × 0.004329 gallons = 12 gallons

Therefore, the volume the second similar can with a 24-inch radius will hold = 12 gallons.

8 0

2 years ago

A person has an unknown element with a volume of 16 cubic inches and a weight of 4.13 pounds.

yawa3891 [41]

Answer is A.Zinc
If it not it still Zinc

7 0

1 year ago

The distribution of cholesterol levels in teenage boys is approximately normal withnbsp mu equals 170 and sigma equals 30 (Sour

ddd [48]

Answer: 0.0336

Step-by-step explanation:

Given : The distribution of cholesterol levels in teenage boys is approximately normal with mean : $\mu= 170$

Standard deviation : $\sigma= 30$

The formula for z-score is given by :-

$z=\dfrac{x-\mu}{\sigma}$

For x=225

$z=\dfrac{225-170}{30}=1.83$

The p-value = $P(z>1.83)=1-P(z$

$=1-0.966375=0.033625\approx0.0336$

The probability that a teenage boy has a cholesterol level greater than 225 =0.0336

4 0

3 years ago

your classmate tells you the details of the great deal he got on his mortgage: 30- year 3.5% fixed rate with a 10% down payment.

DIA [1.3K]

Answer:

$13,600

Step-by-step explanation:

If he puts a down payment of 10% on $136,000

Then is should be $13,600

4 0

3 years ago

Please help!! Will mark first answerer brainiest​!! Thank you so much!

Please help!! Will mark first answerer brainiest!! Thank you so much!