If x = 3 and y = -1, then 3x2 + 2xy - 5 = ?
A: 18
B: 24
C: 12
D: 16

Answers

Answer 1

Answer: $x = 3 , \ y = -1 \n \n 3x^2 + 2xy - 5 = 3\cdot 3^2 + 2\cdot 3\cdot (-1)-5=\n \n=3\cdot 9 -6-5=27-11=16 \n \n Answer : \ D: \ \ 16$

Answer 2

Answer: $3\cdot3^2+2\cdot3\cdot(-1)-5=27-6-5=16$

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Can someone please help me with this (its percent of change word problems)

6=4x+ 9y?

Solve for y

Answers

Answer:

I will need to know the value of x in order to solve for y.

Also, is 4x and 9y multiplied, added, etc...

Answer:

-4/9x+2/3=y

Step-by-step explanation:

6=4x+9y

bring 4x over to the left side of the equal sign

-4x+6=9y

now divide everything by 9

-4/9x+6/9=y

4 lbs of onions cost $12. How many lbs of onions can you get with $147? PLEASE SHOW WORK....

Answers

Answer:

Step-by-step explanation:if is it 12 per. pound just divide 147 by 12 and you get your answer hope it was helpful

Answer:

49 lbs of onions

Step-by-step explanation:

147/12 = 12.25

12.25 x 4 = 49

I HAVE A FEW PROBLEMS1. for the function f(x)= 2-3x, find f(-4).

A. -10

B. -5

C. 12

D. 14

2. (by the way the table is in the pic for this problem)

the table shows the total number of points a team has scored a different minutes during a game what was the average rate of change between minute 22 and minute 30

Answers

The Answer Is D

F(x)=2-3x
F(-4)=2-3(-4)
F(-4)=2+12
F(-4)=14

WHAT IS THE ANSWER TO THIS PRBLEM

Answers

Multiply the number of books in each box by how many boxes he did: 28x30=840. Do the same for her: 31x25=775. Then subtract hers from his: 840-775=64. Bill had 64 more books than her :)

the correct answer is 64 hope i helped

A model of a rectangular table for a dollhouse is 13 inches long and 8 inches wide. The original table is 52 inches long and 32 inches wide. are the model table and the original table similar figures?

Answers

Hi there, to find if they are similar figures, we have to find if they are the same ratio (fractions). 52 inches and 13 inches equal 52/13, 52÷3=4, the original table is 4 times longer than the model. Now, we have to figure out the width, 32/8 is also 4 because 32÷8=4. The original table is also 4 times wider than the model. So, the two tables are similar.

The regular price of a shirt is $24. The sale price is $18. The sale price is what percent of the regular price?

Answers

$18=24x$

$(18)/(24)=(24x)/(24)$

$0.75=x$

The discount price is 75% of the original price :)

Final answer:

The sale price is 75% of the regular price.

Explanation:

To find the sale price as a percentage of the regular price, we need to determine the ratio of the sale price to the regular price and multiply by 100.