3 years ago

Can someone help me with these questions please?

Mathematics

1 answer:

kotykmax [81]3 years ago

3 0

Step-by-step explanation:

You can solve systems of equations using either substitution or elimination. For these problems, I recommend elimination. I'll do the first one as an example.

-3x + 16y = 9

-4x + 8y = 12

Multiply the second equation by -2.

8x − 16y = -24

Add to the first equation (notice the y's cancel out).

(-3x + 16y) + (8x − 16y) = 9 − 24

5x = -15

Solve for x.

x = -3

Now you can plug this into either equation to find y.

-3(-3) + 16y = 9

9 + 16y = 9

y = 0

The solution is (-3, 0).

You might be interested in

What is 2/9 1/7 1/4 1/3 3/10 in greatest to least

AlexFokin [52]

Answer:

1/3,3/10,1/4,2/9,1/7

Step-by-step explanation

The LCD would 1260 so 1/3= 420/1260, 3/10= 378/1260, 1/4= 315/1260, 2/9= 280/1260, 1/7=180/1260

7 0

3 years ago

Sylvia earns $7 per hour at her afterschool job. One week she worked several hours and received a paycheck for $91. Write and so

Olegator [25]

91=7x
X = 13

Let x equal the amount of hours she worked at the job.

3 0

3 years ago

MATH HELP 50 POINTS AND BRAINLIEST 6(2x + 3) = 20 PLEASE ANSWER

yanalaym [24]

6(2x + 3) = 20
12x + 18 = 20
12x = 2
x = 2/12
x = 1/6 < final answer

hope this helps

4 0

3 years ago

Read 2 more answers

Please hurry it’s urgent

MrRa [10]

Answer:

$V=\pi r^2h\\V=\pi(5)^2(10)\\V=\pi(25)(10)\\V=250\pi\\V=785.4$

Estimated

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

14 less than 8 times 8 number is 3 more than four times the number what is the answer

aliina [53]

Answer:The answer is 11.75

Step-by-step explanation:

5 0

3 years ago