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
coldgirl [10]
3 years ago
15

-x+2y=9 -7x-2y=-1 Solve each system by elimination

Mathematics
1 answer:
g100num [7]3 years ago
5 0
X - 2y = - 9
7x + 2y = 1

x - 2y = - 9
(+)
7x + 2y = 1
___________
8x = - 8

x = - 1

- 1 - 2y = - 9
2y = 8
y = 4

i am a mathematics teacher. if anything to ask please pm me
You might be interested in
What is the value of the expression below?<br><br> 0.72/0.36*2
Tanya [424]

Answer:

<h2>1</h2>

Step-by-step explanation:

0.72/0.36 x 2

0.72/0.72

1

I'm always happy to help :)

8 0
3 years ago
2/3*x+3/4=8 what is x
matrenka [14]

Answer: x=10 7/8

Step-by-step explanation:

Subtract 3/4 from both sides. Multiply both sides by 3. Divide both sides by 2 (basically just isolate x on one side of the equal sign).

7 0
3 years ago
Find sin (A-B) if sin A = 4/5 with A between 90 and 180 and if cos B = 3/5 with B between 0 and 90
quester [9]

Answer:

sin(A-B) = 24/25

Step-by-step explanation:

The trig identity for the differnce of angles tells you ...

sin(A -B) = sin(A)cos(B) -sin(B)cos(A)

We are given that sin(A) = 4/5 in quadrant II, so cos(A) = -√(1-(4/5)^2) = -3/5.

And we are given that cos(B) = 3/5 in quadrant I, so sin(B) = 4/5.

Then ...

sin(A-B) = (4/5)(3/5) -(4/5)(-3/5) = 12/25 + 12/25 = 24/25

The desired sine is 24/25.

3 0
3 years ago
I need this asappppp Yelp help me
Mandarinka [93]

Answer:

Answer is C.

Step-by-step explanation:

the 7 in 7.5 is in the ones place so you times it by 10 and the 7 would move to the 10s place value

8 0
3 years ago
You buy a 625.05 mL container of dish soap. You already have
Ksenya-84 [330]

Answer:

You have 767.76 mL of soap.

5 0
3 years ago
Read 2 more answers
Other questions:
  • What is the equation of the line perpendicular to the line y=4/9x-2 that passes through the line 4,3
    10·2 answers
  • how do you solve equations with a variable on both sides x-2= -3x+2 I need to use algebra tiles to model and solve
    6·2 answers
  • If f(x) = 3x + 2 and g(x) = x2 + 1, which expression is equivalent to (fog)(x)?
    13·1 answer
  • What is the maximum volume of a pyramid that can fit inside a cube that has side 18 cm long?
    14·1 answer
  • Suppose you deposit $2,000 in a savings account that pays interest at an annual rate of
    7·1 answer
  • Please help, will mark brainliest.
    7·1 answer
  • If 4^(3x-2)=4^(x+1), then x=
    7·1 answer
  • Two qualities, x and y, if x is doubled what happends to y?​
    7·1 answer
  • I think im right can anyone confirm that but if im not please tell me
    9·2 answers
  • Help!! It’s urgent I need help
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!