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2 years ago

.. solve it solve it

Mathematics

1 answer:

Volgvan2 years ago

3 0

Answer:

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The cone and cylinder below have equal surface area

marissa [1.9K]

Answer:

Option B, False

Step-by-step explanation:

Step 1: Get the surface area formulas for both shapes

Surface Area Formula for Cone: $A = \pi * r(r + \sqrt{h^{2} + r^{2}})$

Surface Area Formula for Cylinder: $A = 2\pi rh+2\pi r^{2}$

Step 2: Plug in the values and solve

Cone: $A = \pi * r(r + \sqrt{(3r)^{2} + r^{2}})$

Cone: $A = \pi r^{2} + \pi \sqrt{10}r^{2}$

Cylinder: $A = 2\pi r*r+2\pi r^{2}$

Cylinder: $A=4 \pi r^{2}$

Step 3: Compare

$\pi r^{2} + \pi \sqrt{10}r^{2}\neq 4 \pi r^{2}$

They are not equal, therefore the answer is False.

Answer: Option B, False

6 0

2 years ago

Nine less than five times a number is equal to -30

disa [49]

To solve this question, we can start to set up an equation using what the question is telling us. Since we don't know what the number is, let's make it equal to x.

The phrase "5 times a number" means that we're multiplying our unknown, x, by 5. That is equal to 5x. 9 less than that would be 5x - 9. Since we know that it's equal to -30, we can solve.

5x - 9 = -30

Get all terms with x on one side and the constants on the other

5x - 9 +9 = -30 + 9

Simplify

5x = -21

Now, we can divide both sides by 5 to get our answer of x = - $\frac{21}{5}$

6 0

3 years ago

Read 2 more answers

Can somebody please help me because im going to freak out

steposvetlana [31]

Answer:

-1 is not correct

1 is the correct answer

Step-by-step explanation:

Her mistake was adding a negative sign in the one

The right way is to cross out one negative symbol between the two parentheses

6 0

3 years ago

Write 26 as repeated multiplication?

Harlamova29_29 [7]

Answer:

This is your answer

Table of 26 gives the repeated addition of number 26, repeated for a certain number of times. For example, 4 baskets of 26 apples each, gives the sum of 26 + 26 + 26 + 26 = 104.

5 0

2 years ago

Samira wants to create a weekly budget. She knows how much she wants to save for a whole year. Which number should she divide th

FinnZ [79.3K]

Answer: 52 weeks

Step-by-step explanation:

There are 52 weeks in a year, so she should divide her number by 52.

5 0

3 years ago

Read 2 more answers

.. solve it solve it ​

.. solve it solve it