All categories

3 years ago

Pls someone pls help me with this question pls

Mathematics

1 answer:

lorasvet [3.4K]3 years ago

3 0

Answer:

B) x = 20

Step-by-step explanation:

All triangle interior angles add up to 180 so:

x + 5 + 7x - 5 + x = 180

9x = 180

x = 20

You might be interested in

Solve for x in the equation x^2-4x-9=29

Kipish [7]

X = 2 + √42,2- √42
decimal form: 8.480741, -4.480741
sorry if my answer isn't right

5 0

3 years ago

What is the approximate area of the shaded sector in the circle shown below?

BabaBlast [244]

Answer:

The sector given in the figure is a semi-circle because the degree measure of the chord is 180 degrees.

Area of semicircle = 0.5π $r^{2}$ = 0.5π×4.5 = 6.75 sq. inches

4 0

3 years ago

Read 2 more answers

Come someone please help me and explain this

OLga [1]

Change in y over change in x

7 0

4 years ago

In a random sample of 30 people who rode a roller coaster one day, the mean wait time is 46.7 minutes with a standard deviation

Rainbow [258]

Answer: C. $(29,\ 37.8)$

Step-by-step explanation:

The confidence interval for difference of two population mean is given by :-

$\overline{x}_1-\overline{x}_2\pm z_{\alpha/2}\sqrt{\dfrac{s_1^2}{n_1}+\dfrac{s_2^2}{n_2}}$

Given : Level of significance : $1-\alpha:0.99$

Then , significance level : $\alpha: 1-0.99=0.01$

Critical value : $z_{\alpha/2}=z_{0.005}=2.576$

$n_1=30\ ;\ n_2=50\\\\\overline{x}_1=46.7\ ;\ \overline{x}_2=13.3\\\\s_1=9.2\ ;\ s_2=1.9$

$46.7-13.3\pm(2.576)\sqrt{\dfrac{9.2^2}{30}+\dfrac{1.9^2}{50}}\approx33.4\pm4.38=(29.02\ ,37.78)\approx(29,\ 37.8)$

Hence, a 99% confidence interval for the difference between the mean wait times of everyone who rode both rides $(29,\ 37.8)$

5 0

4 years ago

Write 22 4/5 as a decimal

romanna [79]

change to improper fraction:

22 4/5

22*5=110+4=114

114/5

divide:

114/5=22.8

Thus, 22 4/5 as a decimal is 22.8

7 0

3 years ago

Read 2 more answers