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ivann1987 [24]
3 years ago
9

3a + 4n + 5a 3 - 8n + 11

Mathematics
1 answer:
KonstantinChe [14]3 years ago
6 0

Answer:

8a-4n+14?

Step-by-step explanation:

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Jessica went shopping for a new watch. She found a watch that was originally priced at $50 on sale for $40. What is the percent
Shalnov [3]
Jessica, the answer is 20% off. All percents are out of 100, so you can multiply    50 x 2 = 100, and do the same with 40 x 2 = 80. Take your two answers, 100 and 80, and subtract 100 - 80 = 20, so the answer is 20% Hope this helped!
3 0
3 years ago
iq scores are normally distributed with a mean of 100 and a standard deviation of 15. What percentage of people have an IQ betwe
Natalija [7]

Answer:

"approximately 47.%"

Step-by-step explanation:

Using the statistical function normalcdf( on my old TI-38 calculator:

normalcdf(100,130, 100, 15) returns the fraction 0.477,

so the final answer here is "approximately 47.%"

3 0
3 years ago
Please help please please
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Omg I have the same problem for my vacation homework
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6 0
3 years ago
Are the expressions (4x)^2 and 4x^2 equal in value? How would you explain your answer?
Nastasia [14]
Understand pemdas
parenthasees
exponenets
multiiplication or dividsion
additon or subtraction


(4x)^2=4x times 4x
4x^2=4 times x times x=4(x^2)

(4x)^2=16x^2
4x^2=4(x^2)
values are not equal
(just for fun: 4x^2=(2x)^2)


4 0
4 years ago
You're uncle is having a new roof installed in his house. The roof is a square pyramid. The side length of the base of the roof
Kaylis [27]

Answer:

The height of the roof in his house is 72.43 ft.

Step-by-step explanation:

The volume of square pyramid is :

V=\frac13 Bh

B= area of the base.

h= the height.

Given that,

The roof is a square pyramid in shape. The volume of the roof is 18929.333 cubic feet.

The side length of the base of the roof is 28 feet.

Since the base of the roof is square in shape.

The area of the square is = side²

The area of the base is =(28×28) square feet

                                       =784  square feet

Assume the height of the roof be h ft.

Then, the volume of the roof is = \frac13 Bh

                                                   =\frac13 \times 784 \times h square feet.

According to the problem,

\frac13 \times 784 \times h= 18929.3333

\Rightarrow h=\frac{18929.3333\times 3}{28}

\Rightarrow h\approx 72.43 ft.

The height of the roof in his roof is 72.43 ft.

8 0
3 years ago
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