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3 years ago

2 thousands 7 tens dividido en 10

Mathematics

1 answer:

Nadya [2.5K]3 years ago

3 0

Answer: 207

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If x and y vary directly and x=25 when y=100 find x when y=24.<br> PLEASE HELP FASTTTTTTT

Veseljchak [2.6K]

Answer:

x = 6

Step-by-step explanation:

Given that x and y vary directly then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition x = 25 when y = 100 , then

100 = 25k ( divide both sides by 25 )

4 = k

y = 4x ← equation of variation

When y = 24 , then

24 = 4x ( divide both sides by 4 )

6 = x

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2 years ago

Find the slope of a line that is perpendicular to a line that passes through the points (7,1) and (-14,4)

d1i1m1o1n [39]

The slope of the line is -1/7, so the perpendicular line has a slope of 7

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2 years ago

Follow nikespear37 tik tok

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Answer:

no >:)

Step-by-step explanation:

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2 years ago

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Problem What is the volume of this rectangular prism?

Bumek [7]

Answer:

$\frac{27}{8} cm {}^{3}$

Is the volume of this right rectangular prism.

Step-by-step explanation:

Rectangular prism volume formula is:-

$v = l \times w \times h \\ v = \frac{3}{2} \times \frac{3}{2} \times \frac{3}{2}apply \: fraction \: rule \\ v = \frac{27}{8} .... \frac{a}{b} \times \frac{c}{d} = \frac{a \times b}{c \times d}$

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11 months ago

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Let X1, X2, and X3 represent the times necessary to perform three successive repair tasks at a service facility. Suppose they ar

belka [17]

Answer:

The mean of the total repair time is 150 minutes.

The variance of the total repair time is 725 minutes^2.

Step-by-step explanation:

To solve this problem, we have to use the properties of the mean and the variance. Our random variable is the sum of 3 normal variables.

In the case, for the mean, we have that the mean of the sum of 3 normal variables is equal to the sum of the mean of the 3 variables:

$y=x_1+x_2+x_3 \\\\E(y)=E(x_1+x_2+x_3)=E(x_1)+E(x_2)+E(x_3)\\\\E(y)=50+60+40=150$

For the variance, we apply the property for the sum of independent variables (the correlation between the variables is 0):

$V(y)=V(x_1)+V(x_2)+V(x_3)\\\\V(y)=s_1^2+s_2^2+s_3^2\\\\V(y)=15^2+20^2+10^2\\\\V(y)=225+400+100\\\\V(y)=725$

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2 years ago