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NikAS [45]
3 years ago
9

What is 3x - y = -4 2x - y = -10 Using substitution

Mathematics
2 answers:
kipiarov [429]3 years ago
5 0
3x - y = -4
3x - (-10) = -4 Substitute
3x + 10 = -4 Simplify
3x = -14 Separate numbers and variables
x = -14/3 Divide

2x - y = - 10
2x - (-10) = -10 Substitute
2x + 10 = -10 Simplify
2x = -20 Separate numbers and variables
x = -10 Divide
____ [38]3 years ago
4 0
3x-y=-4
-y=-3x-4
y=3x-4
2
2x-y=10
2x-(3x-4)=10
2x-3x+4=10
x=6
2x-y=-10
2(6)-y=-10
12-y=-10
-y=-22
y=22
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3 0
3 years ago
PLEASE HELP ASAP!:<br><br> Solve for a and b<br> 6a-b=-5<br> 4a-3b = -8
klemol [59]

Answer:

a = -1/2

b = 2

Step-by-step explanation:

Step 1: Rewrite 1st equation

-b = -5 - 6a

b = 5 + 6a

Step 2: Substitution

4a - 3(5 + 6a) = -8

Step 3: Solve

4a - 15 - 18a = -8

-14a - 15 = -8

-14a = 7

a = -1/2

Step 4: Plug in <em>a</em> to find <em>b</em>

6(-1/2) - b = -5

-3 - b = -5

-b = -2

b = 2

7 0
3 years ago
I'm not really good at math, but i would appreciate it if i can get some help with this math problem. 2y^3-4x^2-4-1+3x^2-3y^3-y^
SOVA2 [1]

Answer:

-2y^2 -x^2 -5

Step-by-step explanation:

Just simplify everything. I recomend putting them in seperate groups. By exponent. Don't forget the signs, they are very important.

3 0
3 years ago
Indicate a general rule for the nth term of this sequence. -6b, -3b, 0b, 3b, 6b. . .
GREYUIT [131]

Answer:

a(n) = -16b + (n - 1)(3b)

Step-by-step explanation:

First term is -6b.

Common difference is 3b; each new term is equal to the previous one, plus 3b.

Formula for this arithmetic sequence is

a(n) = -16b + (n - 1)(3b)

4 0
3 years ago
PLEASE HELP NEED ASAP!
Scrat [10]

Answer:

what grade is this

Step-by-step explanation:

4 0
3 years ago
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