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kirill115 [55]
3 years ago
13

1. x + 3(x + 4) = 20​

Mathematics
2 answers:
blagie [28]3 years ago
8 0

x + 3(x + 4) = 20​

Multiply the bracket by 3

(3)(x)(3)(4)=3x+12

x+3x+12=20

4x+12=20

Move +12 to the other side. Sign changes from +12 to -12.

4x+12-12=20-12

4x=8

Divide by 4 for both sides.

4x/4=8/4

Cross out 4 and 4 ,divide by 4 and then becomes x

x=2

Answer: x=2

butalik [34]3 years ago
5 0

Answer: x = 2

Step-by-step explanation: Isolate the variable by dividing each side by factors that don't contain the variable.

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kozerog [31]
X would be 0 and y would be 2 so it would be (0,2)
7 0
3 years ago
According to the National Beer Wholesalers Association, U.S. consumers years and older consumed gallons of beer and cider per pe
12345 [234]

Complete question :

According to the National Beer Wholesalers Association, U.S. consumers 21 years and older consumed 26.9 gallons of beer and cider per person during 2017. A distributor in Milwaukee believes that beer and cider consumption are higher in that city. A sample of consumers 21 years and older in Milwaukee will be taken, and the sample mean 2017 beer and cider consumption will be used to test the following null and alternative hypotheses:

H, :μ< 26.9

Ha : μ> 26.9

a. Assume the sample data led to rejection of the null hypothesis. What would be your conclusion about consumption of beer and cider in Milwaukee?

b. What is the Type I error in this situation? What are the consequences of making this error?

c. What is the Type II error in this situation? What are the consequences of making this error?

Answer:

Kindly check explanation

Step-by-step explanation:

Given the null and alternative hypothesis :

H0 :μ< 26.9

Ha : μ> 26.9

Assume the Null hypothesis is rejected ;

We conclude that there is significant evidence that the mean consumption of beer and cider is higher in the city (more than 26.9 gallons).

B.) Type 1 error is committed when the Null hypothesis is incorrectly rejected.

C.) Type 2 error is committed when we fail to reject a false null hypothesis. In this scenario, we fail to conclude that the average consumption of beer and cider is more than 26.9 gallons per person.

5 0
3 years ago
A car travels 32 km due north and
xenn [34]

Answer:

73.2km

Step-by-step explanation:

first you have to decompose 46 km into y and x components.

x=sin40°*46km

x=0.64*46km

x=29.44km

y=cos40°*46km

y=0.76*46km

y=34.96

now you add the y components together

32+34.96=66.98

finally use Pythagorean thereom to find the resultant vector.

a*a+ b*b=c*c

66.98*66.98+29.44*29.44=c*c

c*c= 4486.3+866.7

c=√5353

c=73.2 km this is the approximate value

6 0
3 years ago
Can some help me answer this question ASAP
Maru [420]

Answer:

A

Step-by-step explanation:

v + w   //substitute values

-3i + 2 - 4i  //combine like terms

-7i +2

4 0
3 years ago
A case a 24 pairs of same king of sports shoes cost a little more than $800. Explain whether $28 per pair is a good estimate of
bixtya [17]

Total number of pairs = 24 pairs.

Total cost of 24 pairs = $800 approximately.

Cost of each pair = \frac{Total \ cost \ of\ 24 \ pairs }{Number \ of \ pairs }

Plugging values in the above formula, we get

Cost of each pair = \frac{800}{24}

If we divide 800 by 24, we get 33.33 approximately.

But in the given problem, estimated cost is given $28 per pair.

If we subtract 33.33-28, we get $5.33.

So, the estimated cost is $5.33 each pair less than the actual cost of each pair.

Therefore, $28 per pair is not a good estimate of the price.

8 0
4 years ago
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