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3 years ago

Terry added 3 and 7 he got the sum of 9 his answer is is not correct described how Terry can find the correct sum

Mathematics

2 answers:

abruzzese [7]3 years ago

8 0

When he added 3+7 he though it is 2+7 the ans is 10

exis [7]3 years ago

5 0

O it is not correct he can find the correct sum by counting and adding 8,9,10 so the answer is ten he was one of his answer he must not of counted right

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25% of 24

FinnZ [79.3K]

Answer:

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Step-by-step explanation:

I'm not showing you all of them, but this one is very simple.

You convert the percent(25%) to a decimal(0.25), then multiply it by the whole number(24). So simple, I got it all in one sentence.

0.25x24=6

25% of 24 is 6.

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hope it helps

6 0

2 years ago

The price of a four-year dinner was $100 two decades ago. A report says that a dinner is 250% of what it was 20 years ago, how m

Leviafan [203]

The original price of a shirt was $20. It was decreased to $15 . What is the percent decrease of the price of this shirt.

Solution to Problem 1:

The absolute decrease is

20 - 15 = $5

The percent decrease is the absolute decrease divided by the the original price (part/whole).

percent decease = 5 / 20 = 0.25

Multiply and divide 0.25 to obtain percent.

percent decease = 0.25 = 0.25 * 100 / 100 = 25 / 100 = 25%

Problem 2:

Mary has a monthly salary of $1200. She spends $280 per month on food. What percent of her monthly salary does she spend on food?

Solution to Problem 2:

The part of her salary that is spent on food is $280 out of her monthly salary of $1200

percent = part / whole = 280 / 1200 = 0.23 (rounded to 2 decimal places)

Multiply and divide 0.23 by 100 to convert in percent

percent = 0.23 * 100 / 100 = 23 / 100 = 23%

Problem 3:

The price of a pair of trousers was decreased by 22% to $30. What was the original price of the trousers?

Solution to Problem 3:

Let x be the original price and y be the absolute decrease. If the price was decreased to $30, then

x - y = 30

y is given by

y = 22% of x = (22 / 100) * x = 0.22 x

Substitute y by 0.22 x in the equation x - y = 30 and solve for x which the original price.

x - 0.22 x = 30

0.78 x = 30

x = $38.5

Check the solution to this problem by reducing the origonal price found $38.5 by 22% and see if it gives $30.

Problem 4:

The price of an item changed from $120 to $100. Then later the price decreased again from $100 to $80. Which of the two decreases was larger in percentage term?

Solution to Problem 4:

First decrease in percent

part / whole = (120 - 100) / 120 = 0.17 = 17%

Second decrease in percent

part / whole = (100 - 80) / 100 = 0.20 = 20%

gave number of questions

same conccepttttt

thanxxxxx

5 0

3 years ago

(90 POINTS) How can you find the length of RT using similarity? Explain your reasoning.

topjm [15]

You can use the pythagorean theorem to find the length of RT for example:

a^2+b^2=c^2

24^2+10^=c^2 when you simplify this you get 26 so the length of RT is 26

3 0

2 years ago

Read 2 more answers

A roller coaster’s height is given by the equation h = –.046t2 + 5t +75, where t represents the time in seconds. How long will i

LuckyWell [14K]

A function assigns the values. The time it will take riders to pass over the hill and reach ground level is 122.05 seconds, thus, the correct option is A.

<h3>What is a Function?</h3>

A function assigns the value of each element of one set to the other specific element of another set.

Given the height of the roller coaster is given by the function,

h = -0.046t²+5t+75

Now, when the roller coaster will complete the ride, therefore, pass over the hill and reach the ground level, the height of the coaster will be zero, therefore, the function will become.

0 = -0.046t²+5t+75

Now, taking the roots of t, we will get,

$t = \dfrac{-5\pm \sqrt{(5)^2-4(-0.046)(75)}}{2(-0.046)}\\\\t =-13.3583, 122.0539$

Since the value of the time can not be negative, therefore, the time will be 122.05 seconds.

Hence, the time it will take riders to pass over the hill and reach ground level is 122.05 seconds, thus, the correct option is A.

Learn more about Function:

brainly.com/question/5245372

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4 0

2 years ago

I need helpppp, how do I find the solutions to the system of linear equations graphed, pls

steposvetlana [31]

Answer:

use desmos graphing calculator

3 0

3 years ago