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Komok [63]
4 years ago
5

Solve the proportion. I will give brainliest. 2/7=r/4

Mathematics
1 answer:
8_murik_8 [283]4 years ago
3 0

Answer:

Cross multiply:

2 * 4 = 7 * r

Simplifying

2 * 4 = 7 * r

Multiply 2 * 4

8 = 7 * r

Solving

8 = 7r

Hope this helps.

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What are two ways to describe the integer n on the expression -7 < n < -4?
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Description 1: "The integer n is between -7 and -4, excluding both endpoints"

Description 2: "The integer n is larger than -7 and smaller than -4"
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3 years ago
The sum of three numbers is 12. The sum of twice the first​ number, 5 times the second​ number, and 6 times the third number is
Ede4ka [16]
A suitable calculator can row-reduce the augmented matrix.

first number: 3
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5 0
4 years ago
In a recent survey, 72 out of 100 consumers reported that they preferred plastic bags instead of paper bags for their groceries.
kupik [55]

Answer:

a) P=0.03

b) α=0.05

c) 0.72

d) 100

e) 0.72

Step-by-step explanation:

a) The P-value is the probability of the sample result. In this case the P-value is 0.03.

b) The level of significance is the threshold of probabilty for the null hypothesis to be reejcted or not. It is contrasted with the P-value to know if the effect is significant. In this case, the level of significance is 0.05.

NOTE: if it is a two-side test, the level of significance is 0.1 (two times 0.05).

c) The sample proportion is the one that results from the sample data. In this case, the sample proportion is 0.72.

p=72/100=0.72

d) The sample size is the amount of consumers reported. In this case is 100 customers.

e) The null value is 0.72 (equal to the sample proportion), because it is tested if there is no difference between the population proportion and the sample proportion.

3 0
3 years ago
Does anybody know how to solve this ?
KATRIN_1 [288]

Answer:

try making a porportion with  57 and 51

Step-by-step explanation:


7 0
3 years ago
All formulas have how many variables?
Misha Larkins [42]

Answer:

The correct option in this case is A.) more than one.

Step-by-step explanation:

All formulas have how many variables?

The correct option in this case is A.) more than one.

8 0
3 years ago
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