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seraphim [82]
3 years ago
5

-4x - 5y=-7 -x+5y=17

Mathematics
1 answer:
ahrayia [7]3 years ago
8 0

Answer:

X=-2,y=3

Step-by-step explanation:

You might be interested in
In a class of 42 students, 18 students are in the Math Club, 5 students
natta225 [31]

Answer:

15 maybe?

Step-by-step explanation:

42 - 14 = 28

18 - 5 = 13

28 - 13 = 15

subtract the 14 because it says it is in neither.

Subtract 5 from 18 because 18 are in math and only 5 are in both math and science.

Subtract 13 from the 28 because those 13 are in math and wont be in science also.

8 0
3 years ago
Read 2 more answers
3(8 – 4x) < 6(x – 5)
evablogger [386]

Answer:

3\left(8-4x\right)

3(8-4x)=241-2x

6(x-5)=6x-30

24-12x

Subtract 24 from both sides

-12x

Now, subtract 6x from both sides

-18x

Multiply both sides by -1

18x>54

Divide 18 from both sides

x>3

<u>OAmalOHopeO</u>

3 0
3 years ago
The sick days of employees every two years in a company are normally distributed with a population standard deviation of 7 days
Alecsey [184]

Answer:

The 95% confidence interval for the population mean is between 17.93 days and 24.07 days.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.96\frac{7}{\sqrt{20}} = 3.07

The lower end of the interval is the sample mean subtracted by M. So it is 21 - 3.07 = 17.93 days

The upper end of the interval is the sample mean added to M. So it is 21 + 3.07 = 24.07 days

The 95% confidence interval for the population mean is between 17.93 days and 24.07 days.

7 0
4 years ago
Read 2 more answers
5(7-x)-3(x+4)-4=4(x-3)+7
Scilla [17]

Answer:

x=2

Step-by-step explanation:

5(7-x)-3(x+4)-4=4(x-3)+7

35-5x-3x-12-4=4x-12+7

19-8x=4x-5

  +8x.  +8x

24=12x

x=2

6 0
3 years ago
What is the measure of angle O in parallelogram LMNO?<br><br> m∠O =
alexdok [17]
Um,
We know that the total interior angle in this parallelogram is 360° because there is the formula that help you with it:
180°(n-2) where n represent the total side of the figure, so
180°(4-2)
=180°(2)
=360°
Next, We see that angle L and angle N are equal with each other, and so angle O and M. Now, we have this equation:
(x+40°)+(x+40)°+(3x)°+(3x)°=360°
x°+40°+x°+40°+3x°+3x°=360°
8x°+80°=360°
Subtract 80° for both side
8x°+80°-80°=360°-80°
8x°=280°
x=35°
Angle O:
3x°
=3(35)°
=105°. As a result, angle O is 105°. Hope it help!
6 0
3 years ago
Read 2 more answers
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