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aivan3 [116]
3 years ago
12

Solve the system of equations.

Mathematics
1 answer:
Semenov [28]3 years ago
4 0
I hope this helps you

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2. The cost of a computer has been discounted by $239, so that the sale price is $1230.
Afina-wow [57]

Answer:

5 dolla footlong

Step-by-step explanation:

8 0
3 years ago
The inverse of a function is a function?
Harlamova29_29 [7]

yes because you do the opposite so it would not be a function

5 0
3 years ago
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

8 0
3 years ago
Simplify the expression (0.4)^3
prisoha [69]
The correct answer to this question is 0.064.

Here's how to simplify the expression (0.4)^3.
We have to multiply 0.4 three times.

(0.4)^3 = <span>0.4 * 0.4 * 0.4
(0.4)^3 = 0.16 * 0.4
(0.4)^3 = 0.064

The simplified answer is 0.064</span>
6 0
3 years ago
Read 2 more answers
Which value is correct? multiple choice
prisoha [69]

Answer:

D) 83

Step-by-step explanation:

x+7=90

x= 83

Hope it's helpful...

5 0
3 years ago
Read 2 more answers
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