Good at area pls helppp <br><br> Find the area. The figure is not drawn to scale.

Can someone help pls omg

hodyreva [135]

Answer:

see explanation

Step-by-step explanation:

Sum the sides of both polygons and equate.

(20)

x + 4 + x + 2 + x + 5 = 2(x + 1) + 2(x + 3) ← distribute parenthesis

3x + 11 = 2x + 2 + 2x + 6

3x + 11 = 4x + 8 ( subtract 3x from both sides )

11 = x + 8 ( subtract 8 from both sides )

3 = x

(21)

5(12x) = x + 7 + 6x + 9 + x + 10

60x = 8x + 26 ( subtract 8x from both sides )

52x = 26 ( divide both sides by 52 )

x = $\frac{26}{52}$ = $\frac{1}{2}$

4 0

2 years ago

In the figure below, angle y and angle x form vertical angles. Angle y forms a straight line with the 80° angle and the 60° angl

Yuri [45]

Answer:Then ask a neighbor for help

Step-by-step explanation:Hey just breath

4 0

2 years ago

Graph B

lara [203]

Answer/Step-by-step explanation:

Slope (m) = rise/run

y-intercept (b) = starting value or the point on the y-axis where the line cuts across

✔️Slope (m) of skater 1:

Rise = 45

Run = 7.5

Slope (m) = 45/7.5 = 6

✔️ y-intercept (b) of Skater 1:

b = 0 (the y-axis is intercepted at 0)

✔️Skater 1 linear function in slope-intercept form, y = mx + b

Substitute m = 6 and b = 0 into y = mx + b

Linear function: y = 6x + 0

y = 6x

✔️Slope (m) of skater 2:

Rise = 30

Run = 15

Slope (m) = 30/15 = 2

✔️ y-intercept (b) of Skater 2:

b = 0 (the y-axis is intercepted at 0)

✔️Skater 2 linear function in slope-intercept form, y = mx + b

Substitute m = 2 and b = 0 into y = mx + b

Linear function: y = 2x + 0

y = 2x

7 0

2 years ago

Consider this equation. 7.8+2(0.75m+0.4)=-6.4m+4(0.5m-0.8) Mia solved the equation and determined that m=2. Is she correct?

IgorC [24]

Answer:

B) She is incorrect because when substituting 2 for m the result was a false statement.

Step-by-step explanation:

Let's solve it for ourselves and see if Mia is correct:

7.8+2(0.75m+0.4)=-6.4m+4(0.5m-0.8)

7.8+1.5m+0.8=-6.4m+2m-3.2

1.5m+8.6=-4.4m-3.2

8.6=-5.9m-3.2

11.8=-5.9m

-2=m

m=-2

Since the answer is actually m=-2, Mia's guess is incorrect because plugging in m=2 does not make both sides equal. Therefore B is the correct option.

8 0

2 years ago

A data set includes 40 pulse rates of men, and those pulse rates have a mean of 67.3 beats per minute and a standard deviation o

Dafna11 [192]

Answer:

The 99% confidence interval of the standard deviation of the pulse rates of men is

$[ 7.949 \ \ , \ 14.387 ]$

Step-by-step explanation:

From the question we are told that

The sample size is n = 40

The mean is $\= x = 67.3 \ beats \ per \ minute$

The standard deviation is $s = 10.3 \ beats \ per \ minute$

Generally the degree of freedom is mathematically represented as

$df = n- 1$

=> $df = 40- 1$

=> $df = 39$

From the question we are told the confidence level is 99% , hence the level of significance is

$\alpha = (100 - 99 ) \%$

=> $\alpha = 0.01$

Generally from the chi distribution table the critical value of at a degree of freedom of is

$X^2 _{\frac{\alpha }{2} , 39} = 65.476$

Generally from the chi distribution table the critical value of at a degree of freedom of is

$X^2 _{1- \frac{\alpha }{2} , 39} = 19.996$

Generally the 99% confidence interval of the standard deviation of the pulse rates of men is mathematically represented as

$s \sqrt{\frac{n- 1}{X^2_{1- \frac{\alpha }{2} , n-1} } }\ \ , \ s \sqrt{\frac{n- 1}{X^2_{\frac{\alpha }{2} , n-1} } }$

=> $10.3 \sqrt{\frac{40- 1}{65.476} }\ \ , \ 10.3 \sqrt{\frac{40- 1}{19.996} }$

=> $[ 7.949 \ \ , \ 14.387 ]$

6 0

2 years ago

Good at area pls helppp Find the area. The figure is not drawn to scale.