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3 years ago

Help me with my math problems

Mathematics

1 answer:

lisabon 2012 [21]3 years ago

7 0

ok send em my way please

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What are the surface area and volume of a regular triangular pyramid with a height of 9 cm and a slant height of 15 cm?

d1i1m1o1n [39]

I believe it is 135.
Hope this helps

3 0

4 years ago

If I can paint 96 sq ft in 15 minutes how long does it take to paint 1 sq ft

White raven [17]

It takes 0.15625 minutes to paint 1 square feet

Solution:

Given that, I can paint 96 sq ft in 15 minutes

To find: Time taken to paint 1 square feet

From given,

96 square feet is painted in 15 minutes

Let "x" be the time taken to paint 1 square feet

Then, we can say,

96 square feet = 15 minutes

1 square feet = x minutes

This forms a proportion and we can solve the sum by cross multiplying

$96 \times x = 15 \times 1\\\\x = \frac{15}{96}\\\\x = 0.15625$

Thus it takes 0.15625 minutes to paint 1 square feet

8 0

3 years ago

5x^{2} + 3x = x^{2} + 7x

Ipatiy [6.2K]

$5x^{2} + 3x = x^{2} + 7x\\
4x^2-4x=0\\
4x(x-1)=0\\
x=0 \vee x=1$

8 0

3 years ago

Please help me it would mean the world. Extra points!

vaieri [72.5K]

Answer:

i inserted image for your work

you can ask for any doubt

3 0

3 years ago

The sum of three consecutive integers is 90. Find the three numbers by letting x

Law Incorporation [45]

Answer:

x = 28

Step-by-step explanation:

let us take three consecutive numbers be (x + 1), (x + 2) and (x + 3)

Now,

The sum of three consecutive integers is 90

i.e.,

(x + 1) + (x + 2) + (x + 3) = 90

x + 1 + x + 2 x + 3 = 90

3x + 6 = 90

3x = 90 - 6

3x = 84

x = 84/3

x = 28

x = 28Thus, The value of x is 28

<h2>VERIFICATION:</h2>

(x + 1) + (x + 2) + (x + 3) = 90

(28 + 1) + (28 + 2) + (28 + 3) = 90

28 + 1 + 28 + 2 + 28 + 3 = 90

90 = 90

8 0

3 years ago

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