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
Usimov [2.4K]
3 years ago
11

X=4y-7 2x+9y=-31 What be the answer

Mathematics
2 answers:
dybincka [34]3 years ago
7 0

Answer:

x=-11

y=-1

Step-by-step explanation:

x=4y-7

2x+9y=-31

2(4y-7)+9y=-31

8y-14+9y=-31

17=-31+14

17y=-17

y=-1

x=4(-1)-7

x=-11

Ksivusya [100]3 years ago
6 0

Answer:

x = -11, y = -1

Step-by-step explanation:

solving simultaneously,

2(4y-7) + 9y = -31

17y = 14 - 31

17y = -17

y = -1

back sub, we get:

x = 4(-1)-7

x = -11

so x = -11, y = -1

You might be interested in
F(x)=x^2+12x+7 f(x)=(x+_)^2+_ Rewrite the function by completing the square
Veseljchak [2.6K]

Answer:

f(x) = (x + 6)² - 29

Step-by-step explanation:

Given

f(x) = x² + 12x + 7

To complete the square

add/subtract ( half the coefficient of the x- term )² to x² + 12x

x² + 2(6)x + 36 - 36 + 7

= (x + 6)² - 29, thus

f(x) = (x + 6)² - 29

6 0
3 years ago
8 is subtracted from twice a number
ankoles [38]

Answer:

2x-8

Step-by-step explanation:

The word "from" tells you that the first part of the sentence should be at the back of the equation because you're taking from the product of 2 times a number, the number is unknown so it is known as "x."

5 0
2 years ago
Consider exponential function h.<br> h(x) = 3x + 4
GarryVolchara [31]

The function is always positive.

(0,5) is the y-intercept, since the graphed line never crosses the x axis, there is no x-intercept.

The function is positive and  greater than 4 for all values of x

Not sure what the actual choices are on a couple of the questions. The choices would help answering.

5 0
2 years ago
The measure of the angle
miv72 [106K]
First, we know this diagram consists of two horizontal lines cut by a transversal line. Therefore, we know that the given angle that measures 113° and the angle we want to find are alternate interior angles. Since all alternate interior angles are equal, we know the unknown angle must also be 113°.

I hope this helps.
5 0
3 years ago
Read 2 more answers
Perpendicular line equation to y=3/5x+1
natulia [17]

Answer:

Find the negative reciprocal of the gradient, so 3 / 5 will switch its denominator with its numerator, and it will have the opposite sign.

So 3/5 will be - 5/3

Answer:

y = - 5 / 3x + 2

3 0
3 years ago
Other questions:
  • 1. Find sin? if cos?=1/2 and ? terminates in Quadrant IV. 2. Find cos? if sin?=(?2)/2 and ? terminates in Quadrant I. 3. Find ta
    11·1 answer
  • Which is the correct simplification of 5.4 x 10^12/ 1.2 x 10^3
    9·1 answer
  • What is the relationship between the “solution” to a quadratic equation and the graph of a quadratic equation? How many possible
    13·1 answer
  • 6 pencils cost 54p how much will 8 pencils cost? <br><br> can you please show me the working out..
    13·2 answers
  • The lengths of the sides of a triangle are in the extended ratio 7​ : 9 ​: 10. The perimeter of the triangle is 52 cm. What are
    9·1 answer
  • Spencer and his sister watched a cartoon movie that was 1 hour and 20 minutes long. After the movie, they played a card game for
    6·1 answer
  • A doctor is studying heights of newborn babies. The doctor uses 20 inches as a reference point. Babies in the study receive a sc
    14·1 answer
  • Anyone a fan of Heathers? If so, wanna be friends?
    11·1 answer
  • If &lt;1 and &lt;2 are complementary angles, and m&lt;1 = 74 degrees ; find m&lt;2.
    15·1 answer
  • . Larry solved this equation. 3(2-3)= x Which representation could Larry have used to solve this equation?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!