Which expression shows you how you can use mental math to simplify the expression (53 + 23) + 7 most easily?53 + (23 + 7)(23 + 53) + 77+ (23 + 53)7+ (53 + 23)

Answers

Answer 1

Answer: It's easiest to add 23 and 7 first.

(53 + 23) + 7 = 53 + (23 + 7)

First choice.

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List all of the prime numbers less than 20 in numerical order

Answers

a prime number is a number only divisible by itself and 1 (this excludes decimals and fractions)

surprise, 1 is not prime because it must be divisible by itself and 1 and the factors of 1 are 1 and 1 so 1 is not prime

2 is prime because it is the first even counting number and since all even numbers after 2 are divisble by 2 you can cross out all odd numbers after 2
3 is prime because it is the first odd counting number that satisfies the condition
4 is not because it is even
5 is prime
6 is not because it is even
7 is prime
8 is not because it is even
9 is not
10 is not because it is even
11 is prime
12 is not because it is even
13 is prime
14 is not because it is even
15 is not
16 is not because it is even
17 is prime
18 is not because it is even
19 is prime
20 is not because it is even

so the numbers are 2,3,5,7,11,13,17,19

19, 17, 13, 11, 7, 5, 3, 2

40 oz > 3 lb true or false?

Answers

1lbs is 16oz, so do the math: 16x3 is 48. 3lbs is 48oz, meaning this is false.

Teds last 3 test scores were 82 91 88 what is the average of his test scores

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The average of his test scores is 87%.
To find the average of a group of numbers, you have to add all the numbers up, and divide the total by how many numbers you added together.

Teds average is 87%. To find the average you must add up all the numbers, and then divide them by the number of numbers there are lol. Hope this helps! <3

What is the percent of change?
initial value:30
final value:180

Answers

600% 30 is 1/6 of 180

600% I looked it up and multiplied 30 by 600 and it equals 180.

Tommy is making a picture graph to show his friends favorite kind of music. he plans to use one musical note to represent 2 people How many notes will he use to represent that4 people chose country music

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The answer will be 2 notes because 1 notes = 2 people; so 2 notes = 4 people

If we assume that 2010 is t=0 what is the initial value and what does it mean? Does the data best fit a linear or an exponential model?

What equation best models this data?

WILL GIVE BRAINLIEST! HELP

Answers

Answer:

309.35 million, the initial number of people in 2010

Step-by-step explanation:

The initial value is when t =0, so looking at the table, (t=0 in 2010) , the initial value is 309.35 million

This is the starting population when use for our exponential growth or decay model. It is the number of people at our initial time. Since the population is increasing, w have exponential growth

The initial value is 309.35

It means that in the year 2010 (starting year) the population was 309,350,000 people or written another way "309.35 million". The second way is more short so probably the more preferred method.

To find the value 309.35, simply look at the table under the value t = 0.

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