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3 years ago

The coordinate grid shows three points P, Q, and R:

Mathematics

1 answer:

a_sh-v [17]3 years ago

4 0

Distance between Q and R only relies on x-values. So, here we do not need to use the distance formula.
R (6,-4) = (X1, Y1)
Q (-8,-4)= (X2,Y2)
distance= X1-X2
d= (6-(-8)) = (6+8)= 14 units

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I’ll give brainlist to anyone that can help me

stiks02 [169]

Answer:

80 ft

Step-by-step explanation:

if 1 = 20 then 20 is width but ? is length

1=20

2=40

3=60

4=80

since 4 in is length then actual length is 80ft

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3 years ago

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According to the manufacturer of a backup UPS device, the normal output voltage is 120 volts. The sample of 40 measured voltage

anyanavicka [17]

Answer:

z = 1.83<1.96

null hypothesis is accepted

The sample is came from a population mean

Step-by-step explanation:

Step :-1

The sample of 40 measured voltage amounts from a unit have a mean of 123.59 volts and a standard deviation of 0.31 volts

given sample size n =40

mean of the sample ×⁻ = 123.59 volts

standard deviation of sample σ = 0.31 volts

Step2:-

Null hypothesis :-

the sample is from a population with a mean equal to 120 volts.

H₀ : μ =120

Alternative hypothesis:-

H₁ : μ ≠120

level of significance:- α =0.05

Step 3:-

The test statistic

$z = \frac{x_{-}-mean }{\frac{S.D}{\sqrt{n} } }$

substitute values and simplification

$z = \frac{123.59-120}{\frac{0.31}{\sqrt{40} } }$

on simplification we get the calculated value

z = 1.83

The tabulated value z =1.96 at 0.05 % level of significance

Conclusion:-

Calculated Z < The tabulated value z =1.96 at 0.05 % level of significance

so the null hypothesis is accepted

The sample is came from a population mean

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3 years ago

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Sphinxa [80]

Answer:

substitute 12 for x in the equation

multiply 68 by 12 months

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Nady [450]

X - the number

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3 years ago

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Leto [7]

Answer:

no solution

Step-by-step explanation:

the x value in a linear equation in slope intercept form represents the slope of the line, since both equations int the system have the same slope there is no solution.

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