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Gelneren [198K]
2 years ago
13

Pls help how do I find the variables? (offering 30 pts, don't answer unless you know the answer.)

Mathematics
1 answer:
meriva2 years ago
3 0

Answer:

Since the above triangle is Iscocleles we can make our equation-

5x - 8 = 2x + 7

5x - 2x = 8 + 7

3x = 15

x = 5

Hope it helps

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Eric surveys students at his school and finds that 80% have a pet. He wants to estimate the probability that, if he randomly sel
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Yes that is correct what is the question
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Evaluate the expression when c = -6 And y = 7<br><br> y - 9c
GrogVix [38]
The answer is 61. hope that help.
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3 years ago
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The mean breaking strength of yarn used in manufacturing drapery material is required to be more than 100 psi. Past experience h
Ganezh [65]

Answer:

H0: μ = 100 ; H1: μ > 100 ;

Test statistic = 0.75 ;

We fail to reject null ;

Kindly check explanation for the rest

Step-by-step explanation:

Given that :

H0: μ = 100

H1: μ > 100

Sample mean, x = 100.6 ; n = 9 ; sample Standard deviation, s = 2.4

Test statistic :

(x - μ) ÷ s/sqrt(n)

(100.6 - 100) ÷ 2.4 / sqrt(9)

0.6 ÷ 0.8 = 0.75

Probability of not rejecting the null :

P = P(Z > 0.75) = 0.22663

α = 0.05

Since, P > α ; we fail to reject the Null ; there is no sufficient evidence to accept the claim that mean strength is > 100 psi

μ + Zcritical*s/sqrt(n)

Zcritical at (1 - α) = 1.645

100 + 1.645*(2.4/3)

100 + 1.316 = 101.316

(x - μ) ÷ s/sqrt(n)

(101.316 - 102) ÷ 2.4 / sqrt(9)

-0.684 ÷ 0.8 = 0.75

= - 0.855

P(Z < - 0.855) = 0.1963 (Z probability calculator).

95% lower confidence interval :

x - error margin, E

E = Zcritical * s/sqrt(n)

E = 1.645 * 0.8 = 1.316

100.6 - 1.316 = 99.284

From part c :

Interval becomes ;

(99.284, 101.316) ; this interval contains the hypothesized mean value of 100. Hence we fail to reject the null.

8 0
2 years ago
A) SSS<br> B) SAS<br> C) ASA<br> D) AAS
amm1812
This is B.SAS (side angle side)
4 0
3 years ago
Cylinder A has a radius of 7 inches and a height of 5 inches. Cylinder B has a volume of 490π. What is the percentage change in
Maru [420]

The percentage change in volume from cylinder A to cylinder B; D: 100%

<h3>How to find the percentage change in Volume?</h3>

Formula for Volume of a Cylinder is;

V = πr²h

Thus, volume of Cylinder A is;

V_a = π * 7² * 5

V_a = 245π

Thus, percentage change in volume is;

[245π/(490π - 490π)] * 100%

Percentage change in volume = 100%

Read more about percentage change in volume at; brainly.com/question/9554871

#SPJ1

8 0
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