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notka56 [123]
3 years ago
10

Timed, please hurry. thank you !

Mathematics
1 answer:
g100num [7]3 years ago
4 0
The answer to this question is 49
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Please help will mark brainliest
Wewaii [24]
Since this is a triangle all the angles within the triangle add up to 180 degrees so....
82+(9x+2)+(7x)=180
82+2+16x=180
16x+84=180
16x=96
X=6
If we plug in X to angle(9x+2) and angle (7x) we will get 56 and 42. We can get angle 2 by subtracting 180-42 which is 138
FINAL ANSWER: 138 degrees
4 0
2 years ago
PLEASE HELP!!
IRISSAK [1]

Step-by-step explanation:

a + b = 6

ab = 1 \times 5 = 5

a = 1  \:  \:  \:  \:  \:  \:  \:  \: b = 5

( {x}^{2}  + x) + (5x + 5)

x(x + 1) + 5(x + 1)

(x + 1)(x + 5)

Hope this is correct and helpful

HAVE A GOOD DAY!

8 0
3 years ago
A survey of 200 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take
Lina20 [59]

Answer:

The 95% confidence interval for the true proportion of university students who use laptop in class to take notes is (0.2839, 0.4161).

Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for population proportion <em>P</em> is:

CI=p\pm z_{\alpha/2}\sqrt{\frac{p(1- p)}{n}}

The information provided is:

<em>x</em> = number of students who responded as"yes" = 70

<em>n</em> = sample size = 200

Confidence level = 95%

The formula to compute the sample proportion is:

p=\frac{x}{n}

The R codes for the construction of the 95% confidence interval is:

> x=70

> n=200

> p=x/n

> p

[1] 0.35

> s=sqrt((p*(1-p))/n)

> s

[1] 0.03372684

> E=qnorm(0.975)*s

> lower=p-E

> upper=p+E

> lower

[1] 0.2838966

> upper

[1] 0.4161034

Thus, the 95% confidence interval for the true proportion of university students who use laptop in class to take notes is (0.2839, 0.4161).

7 0
3 years ago
Read 2 more answers
Solve: 2^x-2^(x-2)=6
malfutka [58]
X=3! Hope this helps (:
5 0
3 years ago
Read 2 more answers
2x−4y=20 whats the answer
alexdok [17]

The answer is

x=10+2y

Steps:

2(x-2y)=20

x-2y=20/2 (in fraction form 20/2)

x-2y=10

X=10+2y

4 0
3 years ago
Read 2 more answers
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