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crimeas [40]
2 years ago
15

HELPPPPPPPPPPP PLEASEEEE THIS IS DUE IN 30 MINS

Mathematics
1 answer:
Daniel [21]2 years ago
3 0

Answer:

1. 5x + 5*2 = 30

2. 5x + 2 = 27

Step-by-step explanation:

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Sienna planned a rectangular pool, as shown in the scale drawing below.
svlad2 [7]

Answer:

The scale factor is

27.5 feet / 22 feet = 1.25.

Explanation:

Whenever you are calculating factors, you are comparing two measurements. In this problem we compared a longer length to a shorter length pool. The length was changed to (27.5 feet) and youre comparing to the length it was originally (22 feet).

Ok so you know the two measurements being compared, but how come it’s 27.5/22 and not 22/27.5? Because the value got bigger.

In this problem you had a pool with long side of 22 ft. But then you made it longer to 27.5 ft. So it scales up,

It went from 100% its length to 125% its length. So the length is 125% / 100% = 1.25 times longer than it used to be.

Here’s another example:

How do you calculate your grade percentage on a test? You take the amount of points you earned and divide by the total possible points. Your grade percentage is a comparison of your score (Compare value) compared to a perfect score (reference value) .

So lets say your test had 22 total points. You get all the answers correct so you get 22/22 points which is 22/22*100 = 100%. Let’s say you get an extra bonus question correct so you end up with even more points and you get 27.5 points out of 22. By getting the bonus points you scaled up your score! Now your score is 27.5/22 * 100 = 125%. So you went from 100% to a 125%. Or from a scale factor of 1 to 1.25.

Whenever the value is getting bigger than it was, you’re going to have a compared percentage over 100%. If the value gets smaller, then you would get a compared percentage less than 100%. Similarly a factor scale is going to be over 1 if the compared value is getting bigger, and less than 1 if it’s getting smaller.

So you don’t need to use percentages, factors are the same they just look a little different.

27.5/22 = 125% / 100% = 1.25

In summary just do this division:

(compare value)/(reference value). The result is how big the top value is compared to the bottom value.

5 0
3 years ago
Read 2 more answers
HELP<br> What is the volume of the cylinder below ?
blagie [28]

Answer:

C. 2448π units³

Step-by-step explanation:

V = π·r²·h

= π·12²×17

= 144×17·π

= 2448π units³

7 0
3 years ago
which of the following demonstrates how the first 21 on the left side of the triangle is calculated using the combination patter
d1i1m1o1n [39]

Answer:

d

Step-by-step explanation:

7 0
3 years ago
there are n arithmetic means between 4 and 24. if the ratio of third mean to the last mean is 4:5 then find the number of terms
Radda [10]

<em> </em><em>Ans</em><em> </em><em>is</em><em> </em><em>in</em><em> </em><em>attached</em><em> </em><em>picture</em><em>.</em>

<em>Hope</em><em> </em><em>this</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em> </em><em>hai</em><em>.</em><em> </em><em> </em><em>dai</em><em>.</em><em>.</em><em>.</em><em>.</em>

6 0
2 years ago
Lily finished a task in 3/4 hour .Ella finished it in 4/5 of time Lily took.How long did Ella take to finish the task?
Zarrin [17]

Time taken by Ella is 0.6 hour

<u>Solution:</u>

Lily finished a task in \frac{3}{4} hour

Ella finished it in \frac{4}{5} of time Lily took

<em><u>To find: time taken by Ella to finish the task</u></em>

Let "L" be the time taken by Lily

Time taken by Lily = L = \frac{3}{4} \text{ hour }

From given statement,

Time taken by Ella to finish the task is \frac{4}{5} of time Lily took

Therefore,

Time taken by Ella = \frac{4}{5} of time taken by Lily

\text{ Time taken by Ella } = \frac{4}{5} \text{ of } \frac{3}{4}\\\\\text{ Time taken by Ella } = \frac{4}{5} \times \frac{3}{4}\\\\\text{ Time taken by Ella } = \frac{3}{5}\\\\\text{ Time taken by Ella } = 0.6

Thus time taken by Ella is 0.6 hour

7 0
3 years ago
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