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Sloan [31]
3 years ago
9

Help i’m begging plsss

Mathematics
1 answer:
olga_2 [115]3 years ago
3 0

Answer:

x=8

Step-by-step explanation:

Given

AB||CD

\angle ABC = 5x + 50

\angle BCD = 7x + 34

Required

Find x

If AB||CD i.e. If AB is parallel to CD, then

\angle ABC = \angle BCD

Substitute values for ABC and BCD

5x + 50 = 7x + 34

Collect Like Terms

5x - 7x = -50 + 34

-2x = -16

Multiply through by -\frac{1}{2}

-\frac{1}{2} * -2x = -16 * -\frac{1}{2}

\frac{1}{2} * 2x = 16 * \frac{1}{2}

\frac{2x}{2} = \frac{16}{2}

x = \frac{16}{2}

x=8

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Help me....................​
marta [7]

Answer:

2*2 = 4

4^4 = 16

16 > x + 4

Step-by-step explanation:

X is any real number less than 12

7 0
2 years ago
A gardener works for 13 hours during a week and charges $169 how much does the gardener charge for each hour?​
bonufazy [111]

Answer:

You have to divide to unit price, 169/13 is equal to 13!

Step-by-step explanation:

7 0
2 years ago
The sum of 5 times a number and 8 is equal to 9
Irina-Kira [14]

Answer:

The unknown number is \frac{1}{5}

Step-by-step explanation:

Let's make the unknown number x.

The sum of 5 TIMES a number (x) & 8 is 9.

Let's write it mathematically.

5x + 8 =9

We are trying to find the unknown number, so let's remove all the numbers from the left side to find x. Minus 8.

5x=1

5x is basically 5 times x, so to find x, we need to divide and from there we can remove 5.

x= \frac{1}{5}

4 0
2 years ago
What is the value of x in this figure?
slega [8]
Check the picture below.

\bf 10\cdot \stackrel{cos(30^o)}{\cfrac{\sqrt{3}}{2}}=x\implies 5\sqrt{3}=x

5 0
3 years ago
An ammunition producer claims his best product has an average lifespan of exactly 18 years. A skeptical product evaluator asks f
DochEvi [55]

Answer:

The 90% confidence interval for the true mean lifespan of this product is between 13.1 and 16.9 years.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 50 - 1 = 49

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 49 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 1.6766

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.6766\frac{8}{\sqrt{50}} = 1.9

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 15 - 1.9 = 13.1 years

The upper end of the interval is the sample mean added to M. So it is 15 + 1.9 = 16.9 years

The 90% confidence interval for the true mean lifespan of this product is between 13.1 and 16.9 years.

8 0
2 years ago
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