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3 years ago

What is the value of x in the figure ?

Mathematics

2 answers:

bekas [8.4K]3 years ago

5 0

You’d have to take the equation and set it equal to 145. So 2x+15=145 and solve it.
2x=130
x=65

morpeh [17]3 years ago

3 0

Step-by-step explanation:

$2x+15= 145°$

( vertically opposite angles)

$2x=145-15 = 130$

$x = \frac{130}{2}$

$x = 65$

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3 years ago

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2 years ago

20) A company made $4500 in profit and reserved $90 for training staff. What percentage of the profit, does the company reserve

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Answer:

Step-by-step explanation:

the amount reserved in % is ($90÷$4500)×100=2%

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3 years ago

Jayden has x nickels and y pennies. He has at most 14 coins worth no less than $0.34 combined. Solve this system of inequalities

oee [108]

Answer:

Step-by-step explanation:

Number of nickels with Jayden = x

Number of pennies with Jayden = y

Since, number of coins is at most 14,

x + y ≤ 14 -------(1)

Worth of nickels = $0.05x

Worth of pennies = $0.01y

Since, worth of pennies is not less than $0.34,

0.05x + 0.01y ≥ 0.34

5x + y ≥ 34 --------(2)

By using a graphing calculator,

Common point of of both the inequalities is (5, 9)

Therefore, Number of nickels = 5

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3 years ago

A polling company has decided to increase the size of its random sample of voters from about 2,000 people to about 4,500 people

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The effect of this increase <u>will reduce the variability of the estimate</u>.

<u>Step-by-step explanation</u>:

Variability of a sample can be determined with the help of variance and standard deviation. Sampling variability shows the variation in the estimate between the samples.

Variability is defined as the how close the scores in the distribution are to the middle of the distribution.

In the above scenario, the polling company increases the size of the random sample of voters before election. The proportion of the voters is estimated with the help of poll. The effect of increasing the sample is to reduce the variability of the estimate.

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3 years ago