All categories

3 years ago

-3(4x-1) + 9x +8x if x = -9

Mathematics

1 answer:

Murljashka [212]3 years ago

5 0

Answer:

-42

Step-by-step explanation:

You might be interested in

3/4 times -4 2/9 I have no idea what that equals please help

anygoal [31]

Answer:

-3.16666667

Step-by-step explanation:

7 0

3 years ago

I've been stuck on this for a while

Lynna [10]

First find the circumference of the patio.
Diameter is πd.
8 x 3.14 = 25.12
210º is approximately 58%.
Multiply 25.12 by .58 to get approximately 14.7 meters.
Hope this helps!

7 0

3 years ago

Change the fraction 7/12 to a decimal. Round your answer to the nearest thousandth. A. 1.714 B. 1.700 C. .600 D. .583

mrs_skeptik [129]

Divide

7/12 = .583

We get answer: D. .583

4 0

3 years ago

There are three executives in an office, ages 56, 57, and 58. If a 57-year-old executive enters the room, the

vova2212 [387]

Answer:

option (c) The mean age will stay the same but the variance will decrease

Step-by-step explanation:

Case I: For 3 executives of ages 56, 57 and 58

Number of executives, n = 3

Mean = $\frac{\textup{56 + 57 + 58 }}{\textup{3}}$

Mean = 57

Variance = $\frac{\sum{(Data - Mean)^2}}{\textup{n-1}}$

Variance = $\frac{(56 - 57)^2+(57-57)^2+(58-57)^2}{\textup{3-1}}$

Variance = $\frac{1+0+1}{\textup{2}}$

Variance = 1

For Case II: For 4 executives of ages 56, 57, 58 and 57

Number of executives, n = 4

Mean = $\frac{\textup{56 + 57 + 58 + 57 }}{\textup{4}}$

Mean = 57

Variance = $\frac{\sum{(Data - Mean)^2}}{\textup{n-1}}$

Variance = $\frac{(56 - 57)^2+(57-57)^2+(58-57)^2+(57-57)^2}{\textup{4-1}}$

Variance = $\frac{1+0+1+0}{\textup{3}}$

Variance = 0.67

Hence,

Mean will remain the same and the variance will decrease

Hence,

The correct answer is option (c) The mean age will stay the same but the variance will decrease

3 0

3 years ago

What is 1x1? please help me lol

Ksju [112]

Answer:

Step-by-step explanation:

1 times anything is itself

you're welcome

7 0

3 years ago

Read 2 more answers