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mart [117]
2 years ago
11

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen

t to x from the second equation is substituted into the first equation.
3x + 2y = −21
x − 3y = 4

A. 3(3y + 4) + 2y = −21
B. 3(−3y + 4) + 2y = −21
C. 3x + 2(3y + 4) = −21
D. 3x + 2(−3y + 4) = −21
Mathematics
1 answer:
KATRIN_1 [288]2 years ago
7 0

Answer:

B

Step-by-step explanation:

when you subtact 3y on both sides

you get x = -3y+4

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What is the answer to 5 1/2 - 2/3
aniked [119]

To solve this problem, we first have to convert 5 1/2 into an improper fraction. To do this, we multiply the unit (5) times the denominator (2) and then add the numerator (1) to the product, while still keeping the same denominator.


(5 * 2) + 1 = 10 + 1 = 11/2


Now, this makes our expression: 11/2 - 2/3


Next, we have to find a common denominator for 2 and 3 by finding their shared LCM, or least common multiple. In this case, the LCM is 6. This means that we are going to convert both of the fractions in the expression into fractions with the denominator 6, so that we can easily compute the subtraction.


11 * 3 / 2 * 3 - 2 * 2 / 3 * 2


33/6 - 4/6


Now, we can simply subtract the numerators to find our final answer.


29/6


Your final answer is 29/6.


Hope this helps!



3 0
3 years ago
Need answer????????????????????
zaharov [31]

Answer: .625 I believe

Step-by-step explanation:

6 0
3 years ago
What is z/5 + 3 = -35
user100 [1]
\frac{z}{5} +3=-35 = 5 \frac{z}{5} +5*3 = -5* 35 = z+15=-175 = 

z+15-15=-175-15 = 
z = -190
3 0
3 years ago
SOMEONE PLEASE HELP ME ON THIS. THANKS! :
Karo-lina-s [1.5K]

Answer:

99 + 34.99x = y

Step-by-step explanation:

initial fee of $99

multiply the monthly fee (34.99) and how many months he's a member (x)

add the initial fee and total of monthly payments to get total he will spend (y)

5 0
2 years ago
Which equation is equivalent to the given equation?
Feliz [49]

Answer:

3x² - 12x - 9 = 0

Step-by-step explanation:

3x² - 12x - 9 = 0

3x² - 12x =9

9-9=0

5 0
2 years ago
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