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3 years ago

BRAINLIESTT ASAP! PLEASE HELP ME :) thanks!

Mathematics

2 answers:

VashaNatasha [74]3 years ago

5 0

Since 3x+17=5x-3, x= 10. so angles

azamat3 years ago

4 0

In the parallelogram shown in the image, the opposite angles are the same.

So, ∠D = ∠B (3x + 17 = 5x - 3)

Solve for x.

3x + 17 = 5x - 3

~Subtract 17 to both sides

3x + 17 - 17 = 5x - 3 - 17

~Simplify

3x = 5x - 20

~Subtract 5x to both sides

3x - 5x = 5x - 5x - 20

~Simplify

-2x = -20

~Divide -2 to both sides

-2x/-2 = -20/-2

~Simplify

x = 10

Substitute x with 10 for ∠B

5(10) - 3

50 - 3

47°

Parallelograms have adjacent angles which are supplementary.

So, ∠A + ∠B = 180°

We know that ∠B = 47°, so, solve for ∠A.

∠A + 47 = 180

∠A + 47 - 47 = 180 - 47

∠A = 133°

Therefore, the measure of ∠DAB is 133°

Best of Luck!

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postnew [5]

Answer:

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3 years ago

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jeka57 [31]

Answer:

=> Apply law of cosine

$c^2=a^2+b^2-2abcos\left(C\right)$

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2 years ago

Consider a population list x, with a CV= 10%. A second population list, y, has a CV= 20%. The linear regression of y on x is y =

ch4aika [34]

Answer:

The correlation coefficient 0.5 depicts that there is moderate positive correlation between y and x.

Step-by-step explanation:

The linear regression equation is

y= a+bx

The given linear equation is

y= 10x

Here, slope=b=10 and intercept=a=0.

From above equation,

ybar=10xbar

We are given that CVx=0.1 and CVy=0.2

where CV=(standard deviation/mean)*100

We know that

b=r(Sy/Sx)

Multiplying by xbar/ybar on both sides

(xbar/ybar)b=r(Sy/Sx)(xbar/ybar)

(xbar/ybar)b=r[(Sy/ybar)/(Sx/xbar))]

(xbar/ybar)b=r[CVy/CVx]

As CVy/CVx=(Sy/ybar)*100/(Sx/xbar)*100=(Sy/ybar)/(Sx/xbar).

By putting ybar=10xbar, b=10, CVx=0.1 and CVy=0.2.

(xbar/10xbar)10=r(0.2/0.1)

1=r(0.2/0.1)

1=r(2)

r=0.5

There is moderate positive correlation between y and x.

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3 years ago

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Rashid [163]

Answer: 16

Step-by-step explanation:

7 0

2 years ago

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nadezda [96]

Yes. -63 / 3 = -21.

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3 years ago

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