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3 years ago

I need help on how to do this!!!?

Mathematics

1 answer:

liraira [26]3 years ago

3 0

Let's say you had a cake that is cut into 5 equal slices. Then someone eats 2 of those slices. They ate 2/5 of the cake.

Now let's say you have another cake that you cut into 10 equal slices. If someone eats 4 of those ten, then they have eaten 4/10 = 2/5 of the cake.

Check out the diagram below to see a visual of how 4/10 and 2/5 are equivalent fractions.

Going from 2/5 to 4/10 has us multiply top and bottom by 2.

-----------

Similarly, 1/2 = 5/10 after multiplying top and bottom by 10

The original expression 2/5 + 1/2 turns into 4/10 + 5/10

Then you add the numerators to get 4+5 = 9, placing that over the common denominator of 10

<h3>Answer: 9/10</h3>

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What value of x makes the equation true?

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Answer:

x=5

Step-by-step explanation:

x=5

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3 years ago

Read 2 more answers

(-r-5)-(-2r-4) help me solve pls lol

vaieri [72.5K]

<h3>answer:</h3>

$r - 1$

<h3>Step by step explanation:</h3>

<h3> Step 1: Distribute</h3>

$( - r - 5) - ( - 2r - 4) \\ ( - r - 5) + 2r + 4$

<h3>Step 2: Eliminate redundant parenthesis</h3>

$( - r - 5) + 2r + 4 \\ - r - 5 + 2r + 4$

<h3>Step 3: Add numbers</h3>

$- 3 \purple{ - 5} + 2r + \purple{4} \\ - r \purple{ - 1} + 2r$

<h3>Step 4:Combine like terms </h3>

$\purple{ - r } - 1 + \purple{2r} \\ \purple{1r} - 1$

<h3>Step 5:Multiply by 1</h3>

$1r - 1 \\ r - 1$

Hopefully it's help

8 0

2 years ago

Read 2 more answers

A right cylinder can of PaPi spinach has a diameter length of 4" and a height of 5". what is the total surface area of the spina

Oduvanchick [21]

if the cylinder has a diameter of 4, then its radius is half that, or 2.

$\bf \textit{surface area of a cylinder}\\\\ SA=2\pi r(h+r)~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ r=2\\ h=5 \end{cases}\implies SA=2\pi (2)(5+2)\implies SA=4\pi (7) \\\\\\ SA=28\pi \implies SA\approx 87.964594\implies \stackrel{\textit{rounded up}}{SA=88.0}$

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3 years ago

the sum of 4 times a larger integer and 9 times a smaller integer is 3. the difference between 8 times the larger and 3 times th

kotykmax [81]

Let's break down the problem step by step.

The sum of 4 times a larger integer can be summarized as:

4x

9 times a smaller integer can be summarized as:

9y

We know that we're adding the two expressions because the beginning of the problem has sum. We also know the sum is 3.

So, we get:

4x + 9y = 3

Continuing with the problem, we have the difference between 8 times the larger

8x

We also have 3 times the smaller

3y

This part of the problem mentions the difference between these expressions so we subtract and we know the difference is 27.

8x - 3y = 27

Now, we have both equations so we can solve for either x or y.

4x + 9y = 3
8x - 3y = 27

It's easier to multiply the 4x equation by 2 to have both equations resulting in 8x

(4x + 9y = 3) * 2

We get:

8x +18y = 6

So, we now have:

8x + 18y = 6
8x - 3y = 27

We can subtract the x to get y by itself. We get:

21y = -21

Solve for y and we get:

y = -1

Since we know what y is, we can plug that in and solve for x. It doesn't matter which equation you plug y back in. I'm gonna use the second equation.

8x - 3y = 27
8x - 3 (-1) = 27
8x + 3 = 27
8x = 24
x = 3

So, we now know that

y = -1
x = 3

Hope this helped! If you have any questions then please leave a comment!

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3 years ago

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mars1129 [50]

Answer:

99.7% data lies between 13 to 43

Step-by-step explanation:

Mean: $\mu = 28$