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
KIM [24]
3 years ago
7

Solve the equation-3y = 21 using inverse operations. What is the inverse operation step? What is the solution?

Mathematics
2 answers:
Ksju [112]3 years ago
6 0

Answer:

Y=-7

Step-by-step explanation:

GaryK [48]3 years ago
5 0

Answer:

-7

Step-by-step explanation:

You divide -3 on both sides to get the variable by itself, so -3 divided by 21 is -7

You might be interested in
Please help I really dont understand
Leviafan [203]

Step-by-step explanation:

Probability that Dan chooses a Green card = 0.2

Probability that Esther chooses a Green card = 0.2 (same set of cards = same probability)

Since they are independent events,

total probability = 0.2 * 0.2 = 0.04.

7 0
3 years ago
Cookies are on sale! Today each cookie costs \$0.75$0.75dollar sign, 0, point, 75 less than the normal price. Right now if you b
seropon [69]

The <u><em>correct answer</em></u> is:

The equation is 7(c-0.75) = 2.80, and the regular price of a cookie is c = $1.15.

Explanation:

c is the regular price of a cookie. We know that today they are $0.75 less than the normal price; this is given by the expression c-0.75.

We also know if we buy 7 of them, the total is $2.80. This means we multiply our expression, c-0.75, by 7 and set it equal to $2.80:

7(c-0.75) = 2.80

To solve, first use the distributive property:

7*c-7*0.75 = 2.80

7c-5.25 = 2.80

Add 5.25 to each side:

7c-5.25+5.25 = 2.80+5.25

7c = 8.05

Divide each side by 7:

7c/7 = 8.05/7

c = $1.15.

7 0
3 years ago
Read 2 more answers
Find the total area the regular pyramid.<br><br> T.A. =
m_a_m_a [10]

Answer:

20 +4√2

Step-by-step explanation:

Find the total area the regular pyramid = A + 1/2ps

A is the Base area

p is the perimeter of the base

s is slant height

A = 1/2 * 4 * 4

A = 16/2

A = 8

p = 4 + 4 + (√4^2+4^2)

p = 8 + √32

p = 8 + 4√2

s = 4

Substitute

TSA = 8 + 8 + 4√2 + 4

TSA = 20 +4√2

Hence the total surface area is 20 +4√2

3 0
3 years ago
In the middle school debate club,30% of the members are in sixth grade.if there are 12 sixth graders in the debate club,how many
kondaur [170]

Answer:

54

Step-by-step explanation:  

8 0
3 years ago
What is the value of x?
Mariulka [41]

Answer:  x = 7

`Step-by-step explanation:

Because the figure shows two triangles that are similar. we can write and solve an equation of ratios:

 9 cm       72 cm

----------- = -----------

3x - 20      56 cm

Cross-multiplying, we get (3x - 20)(72 cm) = (9 cm)(56 cm) = 504 cm²

Dividing both sides by 72 cm, we get:

3x - 20 = (504 cm²) / (72 cm) = 7

Then 3x - 20 = 7, and 3x = 27.  Then x must be 9.

4 0
3 years ago
Read 2 more answers
Other questions:
  • A store sells packages of comic books with a poster. A poster and 3 comics cost ​$9.99. A poster and 12 comics cost ​$18.99. Wri
    9·1 answer
  • 6 cm
    14·1 answer
  • What is f(x) = 8x^2 + 4x written in vertex form?
    8·1 answer
  • 6x - 15 = 3 (2x-6) + 3
    5·1 answer
  • Thomas has $6.35 in dimes and quarters. The number of dimes is three more than three times the number of quarters. How many quar
    9·2 answers
  • Which answers do I circle a little confused here?
    12·2 answers
  • A lock has 60 digits, and the combination involves turning right to the first number, turning left to the second number, and tur
    13·1 answer
  • At the cafeteria, sandwiches all cost the same amount. Mr. S. buys 2 turkey sandwiches, and a juice for $.75. Mr. B buys three r
    14·1 answer
  • Please help me!! I’ll give brainliest also!!
    11·1 answer
  • Pleaseee help need done asappppppp
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!