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
Delicious77 [7]
3 years ago
9

I need a step by step explanation on how you solved the equation.

Mathematics
1 answer:
Ghella [55]3 years ago
7 0

Answer: x=3 and y=−2

Step-by-step explanation:

x=−2y−1;4x−4y=20

Step: Solve x=−2y−1 for x:

Step: Substitute−2y−1 for x in 4x−4y=20:

4x−4y=20

4(−2y−1)−4y=20

−12y−4=20(Simplify both sides of the equation)

−12y−4+4=20+4(Add 4 to both sides)

−12y=24

−12y

−12

=

24

−12

(Divide both sides by -12)

y=−2

Step: Substitute−2 for y x=−2y−1:

x=−2y−1

x=(−2)(−2)−1

x=3(Simplify both sides of the equation)

You might be interested in
What type of association does the scatterplot appear to have?
inn [45]

Answer:

positive linear association

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Divide 5600 in the ratio 4 :5:7 <br>​
Elis [28]

Answer:

Step-by-step explanation:

So in our case, let assume 'x' as a common factor.

Thus,

4x + 5x + 7x = 5600;

16x = 5600;

x = 5600/16 = 350.

So,

4x= 350*4 =1400;

5x= 350*5 = 1750; &

7x= 350*7 = 2450.

Your answer is, 5600 = 1400+1750+2450 which is in ratio of 4:5:7.

5 0
2 years ago
A triangle has angles that measure 72.5 degrees and 32.7 degrees. What is the measure of the third angle?
astraxan [27]
72.5+32.7= 105.2
Triangle angles have to equal 180
180-105.2= 74.8
Third angle= 74.8 degrees
8 0
3 years ago
Read 2 more answers
Reid's Hardware discounts all riding lawnmowers 8% to customers paying in cash. If Trey paid $1,193.89 in cash for a riding lawn
MArishka [77]

Are there chocies ???

Step-by-step explanation:

8 0
3 years ago
Please help me.........
marishachu [46]

Answer:

126 square feet

Step-by-step explanation:

The formula for the area of a triangle is ...

A = (1/2)bh . . . . . where b is the base length and h is the height

Here, you have a triangular face that has a base of 6 ft and a height of 14 ft. Its area is ...

A = (1/2)(6 ft)(14 ft) = 42 ft^2

The lateral area of the pyramid consists of 3 such triangles, so the lateral area is ...

LA = 3·(42 ft^2) = 126 ft^2

6 0
3 years ago
Other questions:
  • What is the scale factor of a model car if the scale is 1 Inch=2 feet
    6·1 answer
  • What is the formula to find the length of an arc when given the central angle and radius?
    8·1 answer
  • 100067581234×4555688=
    7·1 answer
  • Solve: -2+5x-7=3x-9+2x
    13·2 answers
  • I can’t figure this out. Please help
    12·2 answers
  • I don't know how to do this?
    9·1 answer
  • PLEASE SOMEONE DO THIS IM RUSHING SO BAD AND IM CRYING - GIVING BRAINLIEST!!!!!
    9·1 answer
  • Match the equivalent expressions.<br><br><br><br> Pls help me
    9·1 answer
  • Help please for math
    6·2 answers
  • Y = (x)(x) is a parent function that makes a graph of a(n)
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!