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
MatroZZZ [7]
3 years ago
15

Can someone please help me solve each system of linear equations by substitution.

Mathematics
1 answer:
lapo4ka [179]3 years ago
3 0

I'm not good at explaining things but I do know how to do the problem

5. 2x-3y=-24

x+6y=18 -> -2(x+6y=18) = -2x-12y=-36

distribute -2 ^

2x-3y=-24 x+6(-4)=18

-2x-12y=-36 x -24 = 18

0-15y= -60 +24 = +24

-15 = -15 x= 42

y = 4 (42,4)

6. x-2y=5

3x-5y=8

x-2y= 5 -> -3(x-2y=5)

-3x+6y= -15

3x-5y=8 x-2y=5

0+ 1y= 7 x-2(7)=5

1 = 1 x-14=5

y = 7 +14= +14

x = 19 (19,7

You might be interested in
Please I rlly need this help!
Hatshy [7]

Answer:

more details about this?

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Need help with my fractions I’m stuck on number 2.
mars1129 [50]

Answer:

Step-by-step explanation:

  1. crate the equasion sp your equasion will look more like this 2/3 multiply by X
  2. Then you divide and you will get your answer that will be

4 0
4 years ago
I need help with my homework I don’t understand everything, just some things.
olga55 [171]

Answer:

1. false; they are only skew if they have no congruency or similarity to the other segment

2. true

3. true

4. false; one is vertical and one is horizontal

5. true

6. false; they are not in the same locations on the cube

Step-by-step explanation:

7. m1 is 45 becuase it is alternate interior angles with b

m2 is 135 because the pair needs to add up to 180

8 0
3 years ago
Hector invests $800 in an account that earns 6.98% annual interest compounded semiannually. Rebecca invests $1000 in an account
Roman55 [17]
A=P (1+r/n)^nt

A= Total amount invested, P=principal amount, r=Interest rate, n=number of time in a year when the interest is earned (for annual, n=1; for semi-annual, n=2, ...), t = time in years

In the current scenario, case 1, n=2; case 2, n=1 and A1=A2, t1=t2
Therefore,
800(1+0.0698/2)^2t = 1000(1+0.0543/1)t
Dividing by 800 on both sides;
(1+0.0349)^2t = 1.25(1+0.02715)^t
(1.0349)^2t = 1.25(1.02715)^t
Taking ln on both sides of the above equation;
2t*ln (1.0349)= ln 1.25 + t*ln (1.02715)
2t*0.0343 = 0.2231+ t*0.0268
0.0686 t = 0.2231+0.0268 t
(0.0686-0.0268)t = 0.2231
0.0418t=0.2231

t=5.337 years

Therefore, after 5.337 years or 5 years and approximately 4 months, their value of investments will be equal.

This value will be,
A=800(1+0.0698/2)^2*5.337 = $1,153.76
3 0
4 years ago
a box is 10 inches long, 3 inches wide, and 4 inches high. what is the surface area in square inches of the closed box
Ilya [14]

Answer:

17

Step-by-step explanation:

10+3=13 adding 4 more =17 there you go hope that help

3 0
2 years ago
Other questions:
  • In his first 64 games, Sasha hit 48 home runs. If he continues at that rate, how many home runs will Sasha hit in his next 272 g
    7·1 answer
  • Assuming that p equals .60 and the sample size is 1,000, what is the probability of observing a sample proportion that is at lea
    12·1 answer
  • When graphing any equation what is a great fall back plan if you can't remember the learned procedure? (on all kinds of equation
    9·1 answer
  • Please help!! i’ve tried everything i could think of and nothing fits!
    11·1 answer
  • A cell tower is located at and transmits a circular signal that covers three major cities. The three cities are located on the c
    5·1 answer
  • A certain man receives bonus every time he sell sh 75500 worth of goods ,how much was his bonus if he received sh 82500 for sell
    10·1 answer
  • PLEASE HELP, I WILL GIVE BRAINLIEST IF ITS RIGHT :)
    14·1 answer
  • 7 1 1 7 1 41<br> Mode ??<br> Median ??
    8·1 answer
  • Please help me the question is in the image
    7·1 answer
  • The product of 2 and the<br> quantity of a number n<br> and 10.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!