1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sloan [31]
3 years ago
12

Solve 5r2 – 12 = 68. {±4} {±5} {±3} {±6}

Mathematics
2 answers:
djyliett [7]3 years ago
7 0
5r2-12=68
+12 +12
5r2 = 80
-80
5r2 -80 = 0
÷5 ÷5 ÷5

r2 -16 = 0
+16 +16
r2 = 16

root: r2 = root: 16
r = {+/- 4}

Airida [17]3 years ago
3 0

Add 12 to both sides:

5r^2 = 80

Divide by 5:

r^2 = 16

Square root both sides:

r = +/- 4

The answer is {+/- 4}.

You might be interested in
Which decimal is equivalent to 8/15
earnstyle [38]
It is 5.33 repeating
4 0
3 years ago
Read 2 more answers
PLEASE PLEASE PLEASE HELP I NEED THIS BY 8:00pm!
Likurg_2 [28]

Answer:

1. $85

2. $90.10

3.$108.12

4.$54.06

Step-by-step explanation:

100-15=85 (15% of 100 is 15)

6 percent of 85 is 5.10. So 85 + 5.10=90.10

20 percent of 90.10 is 18.02. So add that to the total. 90.10+18.02=108.12

Now divide by 2 to get how much they each will pay 108.12/2 = 54.06

6 0
2 years ago
Which algebra expression represents this phase ?
lapo4ka [179]

Answer:

B

Step-by-step explanation:

Product is what you get when you multiply

5 0
3 years ago
Read 2 more answers
Doubling the sum of 5 and a number is equal to the same number decreased by 2. what is the equation
SVEN [57.7K]

Answer:

2(x + 5) = x - 2

⟹ x = -12

Step-by-step explanation:

Doubling the sum of 5 and a number is equal to the same number decreased by 2. What is the equation?

This word problem can be written as:

⟹ 2(x + 5) = x - 2

1. Distribute:

2(x) + 2(5) = x - 2

⟹ 2x + 10 = x - 2

2. Subtract x from both sides:

2x - x + 10 = x - x - 2

⟹ x + 10 = -2

3. Subtract 10 from both sides:

x + 10 - 10 = -2 - 10

⟹ x = -12

4. Check your work:

2(x + 5) = x - 2

2(-12 + 5) = -12 - 2

2(-7) = -20

⟹ -14 = -14 ✔

Learn more here:

brainly.com/question/17821973

3 0
1 year ago
You need to split it in half then multply then add
garri49 [273]
12x23=276
15x5=75
276+75=351
Your answer is 351 square feet
7 0
3 years ago
Other questions:
  • What is the value of [(2/3)^0]^-3
    13·1 answer
  • Joy is planning to purchase a sweater that costs $30 dollars at her local department store. The sweaters are on sale for 20% off
    9·1 answer
  • THE PICTURE IS BELOW DOES ANYBODY KNOW THIS!!
    14·1 answer
  • Sarah spends a total of $60. Based on the information in the table, how many people attended the craft demonstration?
    5·2 answers
  • Your score 60, 70, 60, 80 on your first for quizzes in algebra. What do you need to get on your 5th test in order for your avera
    7·1 answer
  • Using the number line as a guide, work out the difference between the numbers given.
    13·1 answer
  • Given that the measurement is in centimeters, find the area of the circle to the nearest tenth. (Use 3.14 for π)
    14·1 answer
  • How many pints are in 42cups
    12·2 answers
  • Help me please, ty <3
    5·2 answers
  • A truck driver drove 1,602 miles in 8 days. He drove the same number of miles each day. How many miles did he drive each day?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!