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3 years ago

I didn’t come to school and I need help help a friend out plz

Mathematics

1 answer:

tensa zangetsu [6.8K]3 years ago

3 0

Answer:

1.) 7(3+5) = [7x3] + [7x5] 2.) 15-10 = [-5] (3+2)

Step-by-step explanation:

In the first problem, if you look at the way it is put together, you have to multiply 7 times 3, and then 7 times 5 (the answers in the boxes for the first problem would be the answer and technically the other way to write them, and it's also how your supposed to solve the problem.)

In the second problem, you can see that like the first problem, there is a number outside a pair of parentheses with two numbers inside with a plus sign. Now, the plus sign does not mean that you have to add the numbers inside the parentheses, it is just a way of saying that the second number inside the parentheses is positive. No that you have that down, all you have to do is figure out what is the number outside the pair of parentheses, and to do that, you have to just add in numbers in order, and see what equals the 15-10!

Hope this helped!

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Name the solid and find its volume. Use 3.14 as the approximate value of pi.

sineoko [7]

It is given in the question that the solid is a cone with height of 16 units and radius of 7 units .

The formula of volume of cone is

$V = \frac{1}{3} \pi r^2 h$

To find the volume, we substitute the given values of r and h and use 3.14 for pi. That is

$V = \frac{1}{3} *3.14*7^2 *16 = 820.6 \ units \ cube$

And that's the required volume of the cone .

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3 years ago

A sumo wrestling ring is circular and has a circumference of 4 . 6 π meters 4.6π meters. What is the area A A of the sumo wrestl

LUCKY_DIMON [66]

Answer:

$A=5.29\pi$

Step-by-step explanation:

Formula for circumference of a circle is:

Circumference = $2\pi r$

Given circumference of the ring is $4.6\pi$

Now solving for the radius gives us:

$2\pi r=4.6\pi\\r=\frac{4.6\pi}{2\pi}\\r=\frac{4.6}{2}=2.3$

We know that area of a circle is $\pi r^2$ , substituting the value of r we found, we get the area as:

area (A) = $\pi r^2\\\pi (2.3)^2\\\pi (5.29)\\=5.29\pi$

Hence the Area (A), in terms of $\pi$ is $5.29\pi$

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3 years ago

Read 2 more answers

Rationalize the denominator: Please give step by step solution

MrMuchimi

Answer:

1 + i

Step-by-step explanation:

To rationalize multiply numerator and denominator by (2 + i )

$\frac{3+i}{2-i}= \frac{3+i}{2-i} \times \frac{2+i}{2+i} = \frac{(3+i)(2+i)}{(2-i)(2+i)} = \frac{6+3i+2i-1}{4-(-1)} = \frac{5+5i}{5} = 1 + i$

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3 years ago

Suppose that a butterfly can fly 82 feet in 4 seconds. A dragonfly can fly 50 feet in 2 seconds. Which can fly faster and by how

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Distance traveled by butterfly = 82 feet.

Time taken by butterfly =4 seconds

Speed = distance /time

Speed of butterfly = 82/4 = 20.5 feet/second

A dragonfly can fly 50 feet in 2 seconds.

Distance traveled by dragonfly =50 feet.

Time taken by dragonfly =2 seconds.

Speed of dragonfly = 50/2 = 25 feet/second

So dragonfly can fly faster than the butterfly.

Difference in speed = speed of dragonfly - speed of butterfly = 25-20.5 = 4.5

So The dragonfly is 4.5 feet per second faster than butterfly.

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3 years ago

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Mandarinka [93]

Answer:

all x are the solution

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2 years ago