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3 years ago

-3a,-6a whats the answer

Mathematics

2 answers:

kifflom [539]3 years ago

7 0

-3a+-6a= -9a
It would be better to know the question

Sedbober [7]3 years ago

5 0

Answer: -3

Step-by-step explanation:

-3 - (-6) = 3

hope this helps

plz mark brainlesit

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(b) It takes 37 pounds of seed to completely plant a 4-acre field. How many pounds of seed are needed per acre?

maks197457 [2]

Answer:

9.25 lbs

Step-by-step explanation:

37 is the amount for 4 acres or 4a:

37 = 4a

Isolate and find a by dividing both sides by 4:

4a = 37

4a ÷ 4 = $\frac{37}{4}$

a = $\frac{37}{4}$ or 9.25 lbs

Hope this helps!

8 0

3 years ago

Please help i dont know what to do for #1 we never went over it.Help asap Please. You migjt have to flip devoce upside down to s

snow_lady [41]

Answer:. GCF of first two terms is 7r^2.

GCF for last two terms is 2

Step-by-step explanation: GCF means the largest number that the terms can be divided by evenly.

7 and 14 are both divisible by 7. The factors of those terms are (7r^2)(r +2).

r^3 means r × r × r. r^2 means r × r so r^2 is a factor of r^3

2r and 4 are both divisible by 2. The factors of those terms are (2)(r +2)

6 0

3 years ago

A rectangle is 3 1/3 feet long and 2 1/3 feet wide. What is the distance around the rectangle?

Len [333]

The answer is 11.2 or 11 2/3

7 0

3 years ago

Please help find the Arc.

Irina18 [472]

Answer: θ = 162°

Step-by-step explanation:

C = 2πR

therefore R = C/2π = 10/2π = 5/π units

9/2 = Rθ

θ = (9/2) / R = (9/2) / 5/π = (9/2)(π/5) = 9π/10 radians

9π/10 rad(180°/π rad) = 162°

6 0

3 years ago

Let X denote daily work hours. Suppose that for the sample of workers you have, the average daily work hours are 8 hours, with

lubasha [3.4K]

Answer:

The mean for Z is 40.

The standard deviation for Z is 25.

Step-by-step explanation:

We are given the following in the question:

X: daily work hours.

The average daily work hours are 8 hours, with a standard deviation of 5.

$E(x) = 8\\S.D(X) = 5$

$Var(X) = 5^2 = 25$

Z denote weekly work hours.

We have to find the mean and standard deviation for Z.

$E(Z) =E(5x) = 5\tims E(X) = 5\times 8 = 40$

The mean for Z is 40.

We use the property:

$Var(ax) = a^2Var(x)$

$Var(Z) = Var(5x) = 5^2(Var(X)) = 25\times 25 = 625\\S.D(Z) = \sqrt{625} = 25$

Thus, the standard deviation for Z is 25.

6 0

3 years ago

-3a,-6a whats the answer​

-3a,-6a whats the answer