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3 years ago

I need help with this

Mathematics

1 answer:

lianna [129]3 years ago

6 0

Answer:

Step-by-step explanation:

The sides are congruent.

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What is the value of this expression 18+3(10-2)

Alina [70]

Answer:

Step-by-step explanation:

First subtract 10 by 2

18+3(8)

Now multiply 3 and 8

18+24

now add 18 and 24

18+24=42

Hope this helps! : )

6 0

3 years ago

SELECT ALL THAT APPLY. In a population of 250 students, 60% are Whites, 20% are Latinos, 15% are Blacks, and 5% others. In a pro

Sophie [7]

In a proportionate stratified sample of 120, there are 72 Whites, 24 Latinos, 18 Blacks and 6 others.

Proportionate Stratified Sample

A proportionate stratified sample is one in which the size of the strata in the sample is proportional to the size of the strata in the population; in other words, the chance of selecting a unit from a stratum depends on the relative size of that stratum in the population.

Calculating the Proportionate Stratified Sample

The given percentage of -

Whites = 60%

Latinos = 20%

Blacks = 5%

Strength of the sample = 120

⇒ Number of Whites = 60% of 120

= 0.6 × 120

=72

Number of Latinos = 20% of 120

= 0.2 × 120

=24

Proportionate Stratified Sample of Blacks and Others

Count of Blacks = 15 % of 120

= 0.15 × 120

= 18

Count of others = 5% of 120

= 0.05 × 120

Thus, in a Proportionate Stratified Sample of 120, 72 are Whites, 24 are Latinos, 18 are Blacks, and 6 are others.

Learn more about Proportionate Stratified Sample here:

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6 0

2 years ago

A pet store is having a pet fish sale. Mr. Green bought three bags of pet fish for his nephews. Each bag has m mollies and one b

KIM [24]

An algebraic expression that represent how much Mr. Green paid in all is 3(m + 1) + d

The following represents the items bought

Each bag has m mollies and 1 bala
He bought 3 of these bags

The expression that represents the items in a bag is:

$Bag=m + 1\\$

He bought 3 bags.

So, the total spent on pet fish is:

$Total =3(m + 1)$

A box costs d dollars.

This means that, the total amount Mr Green spent in the store is:

$Total =3(m + 1) + d$

Read more about algebraic expressions at:

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7 0

3 years ago

5x=10 solve the equation for x

kobusy [5.1K]

Answer:

x = 2

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

A rectangular bedroom is 10 feet by 12 feet. How many square titles that are 4 inches on each side must be used completely to co

Lilit [14]

Answer:
1,080
Why:
First. you have to turn the feet into inches which would make the room 120in. by 144in. and the area of the room would be 17,280 square inches.
Then you have to find the area of the square tiles, and since the sides of the square are the same length , 4x4=16
Last, you have to divide 17,280 by 16 which would give you 1080 tiles

8 0

3 years ago