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4 years ago

Please help me. Thanks

Mathematics

1 answer:

OlgaM077 [116]4 years ago

4 0

2x+50 and 7x are "vertical angles" and are thus equal to one another.

2x+50 = 7x

50 = 5x

x=10 (answer) You should find the actual angles.

They are 2(10)+50 = 70 and
7(10) = 70

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4(3y-9) can be written as ?

valentina_108 [34]

Hey there!

4(3y - 9)

DISTRIBUTE 4 WITHIN the PARENTHESES

= 4(3y) + 4(-9)

= 12y - 36

Therefore, your answer is: 12y - 36

Good luck on your assignment & enjoy your day!

~Amphitrite1040:)

3 0

3 years ago

Read 2 more answers

Plz help i just dont know plz help

Tpy6a [65]

Answer:

1. $266\dfrac{2}{3}\%$

2. $400\%$

Step-by-step explanation:

1. Fraction $\frac{1}{4}$ is 100%, then

$\dfrac{1}{4} - 100\%\\ \\\dfrac{2}{3} - x\%$

Write a proportion:

$\dfrac{\frac{1}{4}}{\frac{2}{3}}=\dfrac{100}{x}$

Cross multiply:

$\dfrac{1}{4}x=\dfrac{2}{3}\cdot 100\\ \\x=4\cdot \dfrac{2}{3}\cdot 100\\ \\x=\dfrac{800}{3}\\ \\x=266\dfrac{2}{3}\%$

2. Fraction $\frac{1}{6}$ is 100%, then

$\dfrac{1}{6} - 100\%\\ \\\dfrac{2}{3} - x\%$

Write a proportion:

$\dfrac{\frac{1}{6}}{\frac{2}{3}}=\dfrac{100}{x}$

Cross multiply:

$\dfrac{1}{6}x=\dfrac{2}{3}\cdot 100\\ \\x=6\cdot \dfrac{2}{3}\cdot 100\\ \\x=\dfrac{1,200}{3}\\ \\x=400\%$

3 0

3 years ago

The process used to collect data will __________ of the study. affect the validity and the bias affect only the validity affect

Vesna [10]

Answer:

affect the validity and the bias

Step-by-step explanation:

Research bias, which can also be referred to as experimenter bias, is a deliberate attempt by a researcher who is carrying out an experiment to influence the research results, so that he/she can obtain a predetermined outcome. He can do this by deliberately tailoring the method of data collection to such methods as suit the achievement of such predetermined outcome. This is called data collection bias in research. Hence the process of data collection affects the bias of a study.

A study is valid if it truly achieves its aim. Validity refers to how correct or incorrect the results of a scientific study is. Validity of a study often depends on the method of data collection. If the correct method of data collection was used during the study, then its results will be valid.

6 0

3 years ago

15 more than half a number is 9

avanturin [10]

1/2n + 15 = 9 <== ur equation
1/2n = 9 - 15
1/2n = - 6
n = -6 * 2
n = - 12 <== ur solution

4 0

3 years ago

Destiny's age is 3 less than three times Cedric's age. The sum of their ages is 57. How old is Destiny?

Jobisdone [24]

Destiny is 27 years old

10x3=30
30-3=27
27+30=57

6 0

3 years ago