Write a real-world problem that could be represented by the expression 3(23). Then explain how you could solve the problem mentally.

Answers

Answer 1

Answer: 3(23) really means 3*23, or just 3 multiplied by 23. For example: "Jana has 23 dollars. Her friend John has $23, and his friend Jacob also has 23 dollars. How much money do they have all together?" To solve this problem mentally, you could break 3*23 into two numbers you're familiar with multiplying, like 20 and 3, and then add the numbers together. For example: 3*20 + 3*3. 3*20=60, 3*3=9, and 60+9=69. So, 3*23=69.

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How to find interest using numbers other than 100 and having your answer be a percentage.

Answers

To find simple interest, you can use this formula: I=prt.
I=interest
p=principal
r=rate
t=time (years)

3x-2(5-x)=-3(x-10)+3x show work

Answers

This is what I got! I’m a lil rusty.

3x-2(5-x)=-3(x-10)+3x

3x-10+2x=-3x+30+3x
5x-10=30
5x=40
x=8

A ladder is leaning against a building and makes 32° angle with the ground. The top of the ladder reaches 20 feet up on the building.What is the length of the ladder?

Answers

Answer:

37.74 ft

Step-by-step explanation:

An angle and its opposite side are known

Sin (of the angle)= opposite/ hypotenuse

The hypotenuse is equal to the length of the ladder, therefore solve the hypotenuse

Sin (32)= 20/ hypotenuse

hypotenuse= 20/ Sin (32)

Sin (32)=0.5299

hypotenuse= 20/ 0.5299

37.74 ft

Hopefully this helps :)

Answer:

37.74

Step-by-step explanation:

37.74

What is another name for two halves

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2 fractions, 2 pieces.... I hope this helped!

A whole :) 2 pArts or 2/2

Explain how you know whether to add or subtract when you use the distributive property to multiply

Answers

When you are multiplying by a sum you can add then multipy

79, 79, 91, 91, 91, 91, 98, 98, 118, 130, what is the mean median and mode?

Answers

To get the mean you add the numbers and divide by how many numbers there are and then you would get: 784 divided by 10 which would be 78.4 for the mean

mean: add everybody and divide by how many numbers tehre are
first count
10 numbers
add them
(79+79+91+91+91+91+98+98+118+130)=966
divide that by 10
966/10=96.6
mean=96.6

median is the number that is in the middle when you arange them in order from lowest to highest
count to 5th number or 6th and aveage them
91 is median

mode is the number tha appears most often
91 appears 4 times

modse is 91

mean=96.6
median=91
mode=91

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