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3 years ago

PLEASE HELP GRADE IN MATH IS REALLY LOW IM STUPID. Question 1 (Multiple Choice Worth 5 points)

Mathematics

1 answer:

sergeinik [125]3 years ago

3 0

1. No, it is not a valid inference because her classmates do not make up a random sample of the students in the school

2. 80 students

3. 696 students

4. Yes, this is a valid inference because she took a random sample of the neighborhood

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Which of the following is a more precise measurement?

erma4kov [3.2K]

D) 1 hour, 4.5 seconds

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3 years ago

If 2x − 4(x + 1) = −12, evaluate x2 − 1.

Vlad [161]

2x-4(x+1)=-13
1) we solve this equation:
2x-4(x+1)=-12
2x-4x-4=-12
-2x=-12+4
-2x=-8
x=-8/-2
x=4

2) we evalute x²-1
x²-1=4²-1=16-1=15

Answer: 15

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2 years ago

What is the answer.

Alenkasestr [34]

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3 years ago

Trina has a total of 32 crayons.how many boxes of crayons did she buy

Sever21 [200]

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4 0

2 years ago

Read 2 more answers

2 1/4 x2 1/4 in mixed number

maks197457 [2]

Answer:

$5 \frac{1}{16}$ is the answer.

Step-by-step explanation:

Given:

$2 \frac{1}{4} \times 2 \frac{1}{4}$

Step 1: Converting the mixed fraction into fraction:

Multiply 4 by 2 add 1 to the result.

$2\frac{1}{4}$ = $\frac{4 \times 2+1}{4}$

= $\frac{8+1}{4}$

= $\frac{9}{4}$

Step 2: Performing the multiplication using the fraction

= > $\frac{9}{4} \times \frac{9}{4}$

=> $\frac{81}{16}$

Step 3: Converting the product back to mixed fraction

divide 81 by 16 and find the remainder

=> $quotient \frac{remainder}{divisor}$

Dividing 81 by 16 we get 5 as quotient and 1 as remainder

Thus the result in mixed fraction will be

=> $5 \frac{1}{16}$

4 0

2 years ago