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3 years ago

I need help please and thank you

Mathematics

2 answers:

Amanda [17]3 years ago

8 0

Answer:

-2,400

Step-by-step explanation:

since they are in parentheses u multiple them together. a positive number × a negative number is a negative number.

Salsk061 [2.6K]3 years ago

8 0

Answer:

-2,480

Step-by-step explanation:

(31)(-80)

= -2,480

plus × minus = minus

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X2 = 121 solve the equation

german

Answer:

x = 11 or x = -11

Step-by-step explanation:

$x^2 = 121$

$x = \pm\sqrt{121}$

x = 11 or x = -11

3 0

3 years ago

Read 2 more answers

A published report of a repeated-measures research study includes the following description of the statistical analysis. "The re

balandron [24]

Answer:

3 treatment conditions were compared in the study.

14 individuals participated in the study.

Step-by-step explanation:

Consider the provided information.

Part (A) How many treatment conditions were compared in the study?

There are two sets of degrees of freedom; one for the numerator and one for the denominator.

F ratio is defined as: $df=(df_{\text{Between treatment}}, df_{error})$

The formula for between treatment is: $df_{\text{Between treatment}}=k-1$

Substitute $df_{\text{Between treatment}}=2$ in above formula.

$2=k-1$

$k=3$

Therefore, 3 treatment conditions were compared in the study.

Part (B) How many individuals participated in the study?

The error degree of freedom is $df_{error}=(k-1)(n-1)$

Substitute $df_{error}=26$ and k=3 in above formula.

$26=(3-1)(n-1)$

$26=2(n-1)$

$14=n$

Hence, 14 individuals participated in the study.

3 0

3 years ago

Flora is making salsa for a party. Every 1 cup of chopped tomatoes makes 2 3/4 cups of salsa. She uses 1 2/3 cups of tomatoes. H

pogonyaev

Answer:

4 $\frac{7}{12}$ cups of Salsa.

Step-by-step explanation:

Flora is making Salsa for a party.

Every 1 cup of chopped tomatoes makes 2 $\frac{3}{4}$ = $\frac{11}{4}$ cups of Salsa

She uses 1 $\frac{2}{3}$ = $\frac{5}{3}$ cups of tomatoes

1 $\frac{2}{3}$ cups of tomatoes makes:

$\frac{5}{3}$ × $\frac{11}{4}$ ÷ 1 = $\frac{55}{12}$ = 4 $\frac{7}{12}$ cups of Salsa.

5 0

3 years ago

If a table and a bench is $1000 combined. The cost of the table is three times the cost of the bench. What is the cost of the be

attashe74 [19]

1,000= 3x+x. 1,000=4x. 250=x. 1,000= 3(250) +250. 1,000=750+250. The bench costs $250.

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3 years ago

Water tank A has a capacity of 550 gallons and is 66% full. Water tank B is 53% full. The ratio of the capacity of T. How much w

Anna71 [15]

Tank A capacity = 550 gallons 66% x 550 gallons = 363 gallons in Tank A

How about the water in tank B?

ratio of 11: 15 11/15 = 550/x 550 * 15/11 = cap B = 750 gal 53% 0f 750 = .53 x 750 = 397.5 gal in tank B

4 0

3 years ago