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
Elis [28]
3 years ago
13

Solve the system by substitution or elimination

Mathematics
1 answer:
OleMash [197]3 years ago
4 0
X - y = 5,
x = 5 + y
substitute (x = 5 + y) into the first equation,
5 + y + 2y = -1
3y = -6
y = -2,
substitute y = -2 into (x - y = 5),
x + 2 = 5
x = 3

Hence, x = 3, y = -2
You might be interested in
Which of the following expressions would give the number of ways to choose a group of 7 from a group of 15?
OLga [1]

Answer:

B

Step-by-step explanation:

The number of ways to choose a combination of 7 objects from a group of 15 objects is 15! / (7! 8!)

5 0
2 years ago
If w and are numbers, which of the following expressions will always be the distance between w and Q
aev [14]
<h3>Answer: Choice A.  |w - q|</h3>

Let's say for example that w = 10 and q = 7. This means the distance between these values is w-q = 10-7 = 3. This is the distance between w and q.

Now let's make q larger. If w = 12 and q = 20, then w-q = 12-20 = -8 assuming we subtract in the same order. We use absolute value bars to ensure the result is positive. So instead we say

|w - q| = |12 - 20| = | -8 | = 8

Distance is never negative.

3 0
4 years ago
Firefighters used a ladder 50 feet high to reach a window that was 30 feet above the ground. From the same point on the ground,
deff fn [24]
First since 2 of the options ask for the width of BM lets solve for it using the Pythagorean theorem for both sides of point L:
a² + b² = c²
30² + b² = 50²
b² = 50² - 30²
b² = 1600
b = 40    Line BL = 40 ft
Since the ladder is 50 feet it is the same length on the other side as well
a² + b² = c²
40² + b² = 50²
b² = 50² - 40²
b² = 900
b = 30        line LM is 30 ft
SO line lm + line bl = 30 + 40 = 70 ft
A is true because ^
B isn't true because as we solved for earlier, BL is 40
C is true because line LM is in fact 30 ft as we solved for
D is not true because as we said earlier BM is 70
E is true because the same ladder was used on both sides of the street

7 0
3 years ago
In the polynomial below, what number should replace the question mark to produce a difference of squares?
Stella [2.4K]
A polynomial is an algebraic equation that consists of more than one term. Otherwise, it is called a monomial. The technique in producing a difference of the squares is completing of the squares method. For a quadratic formula with a general form of ax2 + bx + c = 0, you can determine c such that the formula could be factored into two monomials. The equation would be (b/2)^2.

For example, if the equation is x^2 + 2x+ __ = 0, c is solved as follows:

c = (2/2)^2 = 1

The equation would be x^2 + 2x +1 = 0. When you simplify and factor it out, the equation would become (x+1)^2 = 0.
3 0
3 years ago
Plz hurry and DONT give me a link
sp2606 [1]

Answer:

Quadrant II

Step-by-step explanation:

(-5,6)

The x coordinate is negative so the quadrant is either 2 or 3

The y coordinate is positive so the quadrant is either 1 or 2

To make both  happen, it must be in quadrant 2

Quadrant II

7 0
2 years ago
Other questions:
  • The monthly mortgage payment on your house is $821.69. it is a 30 year mortgage at 6.5% compounded monthly. how much did you bor
    15·1 answer
  • Name of the geometric solid suggested by a number cube
    15·1 answer
  • I need help in #24 plz
    15·1 answer
  • 5. If the area of the circle is 81π units?, what is the circumference of the circle?​
    13·1 answer
  • A class of 30 students 30 students consists of 8 Chinese girls, 3 Malay girls, 1 Indian girl, 11 Chinese boys, 4 Malay boys and
    7·1 answer
  • What is the angle of the rotation from RST TO R'S'T'
    11·2 answers
  • Two cyclists, 80 miles apart, start riding towards each other at the same time. One cycles three times as fast as the other. If
    5·1 answer
  • Thomas puts $1100 into a savings account that earns 4.5% interest compounded monthly. How much money will he have in savings in
    13·1 answer
  • Find the circumference of a circle whose.<br> A. Diameter is 14cm<br> B. Radius is 3.5cm
    5·1 answer
  • 3) The line that models the data in the scatter plot below is given by the
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!