Factorise: 3a^2 + 7a

Answers

Answer 1

Answer: Hey there, 3a²+7a=A(3a+7), you put 3a+7 in parenthesis, and leave the other a outside of the parenthesis

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Berto has $12 to put gas in his car. If gas costs $3.75 per gallon, which ordered pair on the graph of the line relating number of gallons of gas, x, to the total cost of the gas, y, includes the greatest amount of gas Berto can buy?

Answers

The amount of gas Berto can buy with $12 = 12/3.75 = 3.2 gallons.

Therefore the required ordered pair is (3.2, 12)

If gas costs $3.75 per gallon and Berto has $12, then he can purchase 12/3.75 gallons. This is approximately 3.2 gallons. So the coordinate on this line would be (3.2, 12). I hope that this is the answer that you were looking for and it has helped you.

You have a bag full of 17 marbles. Of those marbles, 3 are black. What is the probability that a marble chosen is not black? A. 1/3 B. 1/17 C. 14/17 D. 3/17

Answers

C.: The answer is C because the probability that the marble chosen WILL be black is choice D: 3/17. However, the question is asking what the probability is that a marble chosen is NOT black. Therefore, you do 17-3 and get 14. So, the answer is 14/17: C.

C. 14/17

17-3=14
There are 14 non-black marbles.

14/17

A certain type of cereal costs $3.79 for 19.5 ounces. What is the unit rate?Enter your answer, rounded to the nearest cent, in the box.

Answers

Answer:

0.19

Step-by-step explanation:

I took the test and passed

Step-by-step explanation:

$3.79 ÷ 19.5 = .194

answer = $.19 per oz

The topic of the worksheet is called Evaluate the Expressionsthe problem i have to answer is (-8)^3 divided by 2^3 ?
how do i solve this.

Answers

one way to do this is to fully expand the exponents:
(-8)^3=-8 times -8 times -8=-512
2^3=8
-512/8=-64

the other way that you are supposed to do it is
factor
-8=-1 times 2^3
(-8)^3=-1 times (2^3)^3=-1 times 2^9
when dividing exponents, subtract
$(x^n)/(x^m)=x^(n-m)$
put the -1 to the side
(-1/1) times (2^9)/(2^3)=(-1/1) times 2^(9-3)=(-1/1) times 2^6=-1 times 64=-64

Help on gradpoint!!!