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Tatiana [17]
3 years ago
6

Try and solve the following system of equations using the substitution method:

Mathematics
1 answer:
MaRussiya [10]3 years ago
5 0

Answer:

y = -3 and x = -3

Step-by-step explanation:

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Will mark brainliest if right and you show your work!
Anna007 [38]

Answer:

(x - 5)(x + 8)

Step-by-step explanation:

Your equation is: x² + 3x - 40

1. Factor the quadratic

(a) Find two numbers that multiply to give -40 and add to give 3.

List the positive factors of 40: 1, 2, 4, 5, 8, 10, 20, 40

One of the numbers must be negative. Start with the numbers near the middle of the list.

By trial and error, you will find that +8 and -5 work:

-5 × 8 = -40 and -5+8 = 3

(b) Rewrite 3x as -5x + 8x

x² - 5x + 8x - 40

(c) Factor the first two and the last two terms

x(x - 5) + 8(x - 5)

(d) Separate the common factor

x² + 3x - 40  = (x - 5)(x + 8)

2. Using Desmos

You can plot the equation with Desmos.

You get a parabola with x-intercepts at x = -8 and x = 5.

These are the solutions to

x + 8 =0 and x - 5 = 0, so

x² + 3x - 40 =  (x+ 8)(x - 5)

6 0
3 years ago
If a number has an infinite amount of 0's on the end of it, can I shorten it to just one 0?
Alex777 [14]

yea just put a line over the 0 to indicate it's infinite

7 0
3 years ago
I will mark you the brainiest for the correct answer, please be correct, Have a good day and take care, thanks. ( VIEW THE IMAGE
Gwar [14]
First error is that the legs are a and b so a should be x and b is 6 and c is 10 the second error is at the end they did not take the square root to get x by itself the real answer should be
X^2 +6^2=10^2
X^2+36=100
X^2 =64
X=8
6 0
3 years ago
What is the value of -33 over 9+2
Nataly [62]

Answer:

11

Step-by-step explanation:

9

+ 2

<u> </u>

11

1 2 3 4 5 6 7 8 9 10 11

what the- to easy bro

7 0
2 years ago
Line I is parallel to line m. If the measure of &lt;6 is 75, what is the measure of &lt;2?
Tamiku [17]

Answer:

the answer is 25 in this question hope it helped

5 0
2 years ago
Read 2 more answers
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