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
myrzilka [38]
3 years ago
11

Solve for x: 9x – 7 = 5x + 21

Mathematics
2 answers:
denis23 [38]3 years ago
8 0

Answer:

x=7

Step-by-step explanation:

add 7 to both sides

9x=5x+28

subtract 5x from both sides

4x=28

divide both sides by 4

x=7

tiny-mole [99]3 years ago
4 0

Answer:

X=7

Step-by-step explanation:

So first you want x on one side so you so subtract 5x from both sides

Then your equation is 4x-7=21

Because you want x by itself, you add 7 to each side because of additive inverse

The equation is now 4x=28

The last step is to divide 4 from each side and that leaves us with 7

x=7

You might be interested in
Can someone help with this math word problem.
iragen [17]

Answer:

Step-by-step explanation:

Time taken to eat the pizza in seconds =28×60=1680 seconds

If it takes 20seconds to lift, bite and chew,

Then the total bites taken to finish the pizza =1680/20 =84 bites

If for each bite 9cm² disappeared, then area that disappeared for 84bites =84×9cm² = 756cm²

Total area of pizza =756cm²

If area =(πd²)/4,

Then d² =(4×A)/π

d²=4×756/3.14=963.06

d=√963.06 = 31.03cm

1 centimeter=0.394inches

31.03cm= 0.394×31.03=12.23 inches ≈ 12inches(to the nearest inch)

The diameter of the pizza is 12inches

7 0
3 years ago
It’s right angle trig<br><br> WILL MARK BRAINLIEST!!!
erastova [34]

c = 17.78

b = 12.12

............

8 0
3 years ago
Read 2 more answers
What is the probability that a randomly drawn marble from bag is green. Given that it is not red?
tatiyna

Answer:

The probability is 0.2, or 20%.

Step-by-step explanation:

A probability is the ratio of the number of relevant outcomes and the number of all possible outcomes. If we know that the marble drawn is not red, the number of possible outcomes N is

N = (number of blue marbles) + (number of green marbles) = 25

and the number of relevant outcomes (marble being green) is n:

n = (number of green marbles) = 5

So, the probability is

P = n / N = 5 / 25 = 1 / 5 or 0.2, or 20%

6 0
3 years ago
Active
Ber [7]

Answer:

The expressions for the payment made to Mary are,

(Monday) 90 = 15m + b

(Tuesday) 62 = 8m + b

where m and b are the fee per student and the base fee, respectively. Solving for m and b, the values are 4 and 30.

The equation that represents Mary's earning is

y = 4x + 30

For 20 students,

y = 4(20) + 30 = 110

For Lisa's earnings,

y = 8x + 15

Substituting 20,

y =8(20) + 15 = 175

Thus, Lisa would earn more than Mary by $65.

(Btw this is not my work, I got it from someone else on brainly and wanted to help lol)

7 0
3 years ago
(this question only goes out to that guy who said he was gonna sue me)
san4es73 [151]

Answer:

6^3= 216

4^4=256

216*256=55296

Step-by-step explanation:

no1 should sue u boo lm.fao

6 0
3 years ago
Other questions:
  • Please help with steps as well!!
    10·2 answers
  • Find each percent of change. Round yo the nearest whole percent if necessary. <br><br> 55 to 35
    12·1 answer
  • Solve |9x | ≦ 81
    5·1 answer
  • Will mark as brainliest if correct
    7·2 answers
  • You run the same speed every day. Saturday you ran 4 miles in 32 minutes. On Sunday you ran 3 miles in m minutes.
    12·2 answers
  • Find the product of the expression:<br> (5p^3) (-1m^8p^2)
    10·1 answer
  • I need help with Additional practice it is find the area of each trapezoids or kite​
    6·1 answer
  • Question in screen shot
    15·1 answer
  • What do I’m supposed to do ?
    6·2 answers
  • 52. Which of the value represent the origin *OA. 1O B.-1OC. 2O D.O
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!