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
Ahat [919]
3 years ago
11

-3x+y=5, y=7 solve using substitution

Mathematics
1 answer:
borishaifa [10]3 years ago
6 0

substitute 7 for y then solve for x

x = 2/3

You might be interested in
Please answer both questions and round answer geometry circles will mark brainliest
aleksandr82 [10.1K]
What questions please give me the questions and i might have an answer for you.
5 0
3 years ago
Evaluate the expression. If necessary, round to the nearest hundredth. log 4 64
Allushta [10]
The correct answer is: 3
Explanation:


Instead of sharing the conventional tedious, method, let me share with you the simple trick here to solve these types of questions without using the calculator:

Given
log_464

It is essentially saying that WHAT power of 4(which is the base of log) gives us the value 64. You need to find the answer to that "WHAT."

Well

4^1 = 4 \\
4^2 = 16 \\
4^3 = 64

Hence the answer is "3".

6 0
3 years ago
Read 2 more answers
Emma ran 3.86 miles yesterday. Today, she ran 3.82 miles. How far did Emma run all together? miles
Luda [366]

Answer:

7.68

Step-by-step explanation:

Just add them :)

7 0
3 years ago
Read 2 more answers
Percy is 8 years older than Ginny. In ten years time he will be three times Ginnys present age. How old is Percy now?
LekaFEV [45]
Now,
G - Ginny's age.
P=G+8, Percy's age.

In 10 years,
G + 10 - Ginny's age in 10 years.
P+10 -  Percy's age in 10 years.

<span> In ten years time Percy (P+10) will be three times Ginnys present age (3G).
P+10=3G

Now we have 2 equations, and we can write a system of equations.

</span>(1)     P=G+8
(2)     P+10=3G  -------> G=(P+10)/3, we need to substitute it into equation 1.

( P=(P+10)/3+8)   /*3
3P=P +10+24
2P = 34
P = 17

Percy is 17 years old now.

Check,
P=17, G=17-8=9
P+10=3G , 17+10=3*9, 27 = 27 True
5 0
3 years ago
Ally babysat nine times. She earned $15, $20, $10, $12, $20, $16, $80, and $18. Find the mean number of dollars that Ally earned
eduard

Answer:

The mean is 21.62 which is approximately 22

Step-by-step explanation:

mean= 15+20+10+12+20+16+80+18/8=21.62 because

mean= sum of all numbers/numbers mentioned

7 0
3 years ago
Other questions:
  • What is the solution to the Inequality -6x&lt;-18
    5·1 answer
  • 2. What is meant by the margin of error of 3.5 percentage points?
    10·1 answer
  • A grasshopper has a length of (5x - 2) inches. A spider has a length of (2x - 1) inches. How much longer is the grasshopper?
    10·1 answer
  • a frisbee has a diameter of approximately 12 inch. What is the circumference of the Frisbee? What is the area of the Frisbee? Us
    12·1 answer
  • 0.04 divided by 19 plzzzzzzzzzzz
    9·2 answers
  • You need a 75% alcohol solution. On hand, you have a 1125 mL of a 90% alcohol mixture. How much pure water will you need to add
    13·1 answer
  • Solve the inequality and explain the stores for the two questions below:
    12·1 answer
  • Lisa and Audrey were selling pizzas to raise money for new cheerleading uniforms. Lisa
    7·1 answer
  • A girl 1.0 m in height, standing on top of a vertical building 45.0 m high sees a car some distance away when the angle of depre
    15·2 answers
  • In the compound interest equation, A(x)= 500(1.07)x, what does the 500 represent?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!