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
alexandr402 [8]
3 years ago
15

Solve the equation... х = Зу-7 3х +4y = 18 X= Y=

Mathematics
2 answers:
vova2212 [387]3 years ago
7 0

Answer:

x = 2, y = 3

Step-by-step explanation:

First we need to choose a variable to solve for. In this case, let's solve for y first since they give us x.

Let's plug the x into the equation.

3(3y - 7) + 4y = 18

Then let's distribute and add like terms.

9y - 21 + 4y = 18

13y - 21 = 18

Then add 21 on both sides.

13y = 39

Then divide by 13 to solve for y.

y = 3

Now that we solved for y, let's use the first equation to solve for x. You could use either one, but the top one will make it easier. Simply plug in the value of y and add like terms.

x = 3(3) - 7

x = 9 - 7

x = 2

<em>Note that if you ever feel unsure about an answer, you can simply plug the value back into the equation and check if they equal each other.</em>

dem82 [27]3 years ago
5 0
X = 2 Y = 3

(2) = 3(3) - 7

2 = 9 - 7

2 =2

3(2) + 4(3) = 18

6 + 12 = 18

18 = 18
You might be interested in
(1)/(31)x^(2)-25=0 <br> a) {+5}<br> b) {+30}<br> c) {+6/5}<br> d) {+5/6}
ahrayia [7]

Answer:

B

Step-by-step explanation:

Please Mark me brainly

hope this help

7 0
2 years ago
Which measurement is not equal to 1 mile? A 1,760 yd B 5,280 yd C 5,280 ft or D 63,360 in
Juliette [100K]
D. I think it that answer because it not close to 1
4 0
3 years ago
Read 2 more answers
Given the diagram below what is the tan 60
GalinKa [24]

Answer:

tan 60 = √3

Step-by-step explanation:

using SOH CAH TOA

tan theta = opposite/adjacent

Let the side opposite  to angle 60 degrees be x

Hence;

tan 30 = 5/x

x = 5/tan 30

x = 5/1/√3

x = 5√3

Get tan 60

tan 60 = 5√3/5

tan 60 = √3

4 0
2 years ago
Can someone explain this to me ?
Alex Ar [27]

Suppose you had f=6, g=2, h=3 and you were asked to find

f - g - h

You would do it by substituting the given values for the letters to get

6 - 2 - 3

And this can be simplified to

1

_____

The question at hand is basically the same. You are given values of f(x), g(x), h(x) and asked to find their signed sum.

f(x) - g(x) - h(x)

= (3x+5) - (4x²-2) - (x²-3x+1) . . . . substitute the given values

= 3x + 5 - 4x² + 2 - x² + 3x - 1 . . . use the distributive property to eliminate parentheses. A minus sign in front changes the sign of every term inside parentheses.

= x²(-4-1) +x(3+3) +(5+2-1)

= -5x² + 6x + 6 . . . . . . collect terms . . . . matches the first choice

8 0
3 years ago
Evaluate the following absolute value expression |-6 |
allsm [11]

Answer:

6

Step-by-step explanation:

|-6| = 6

3 0
3 years ago
Read 2 more answers
Other questions:
  • Evaluate the expression, if possible: √ 64
    15·1 answer
  • Yesterday, a Bakery baked 54 loaves of bread in 20 minutes today the bakery needs to bake 375 loaves of bread at this rate predi
    6·2 answers
  • 1000(100+200-88)+22-4
    5·2 answers
  • Y is inversely proportional to (x + 2)
    7·2 answers
  • I dont understand the work my teacher gave me and I Have 45 pages to do ​
    15·1 answer
  • Garrett buys lunch for himself and his friend. He buys 2 sandwiches, 2 fries, and 2 malts. How much did Garrett spend on lunch?
    9·1 answer
  • What is a angle called when two angles share a common side and a common vertex
    13·2 answers
  • In what direction is a line with an undefined slope going?
    15·2 answers
  • Which of the following satisfy x ≥ 4.1? Select all that apply.
    13·1 answer
  • Pls help me on this
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!