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Brut [27]
3 years ago
10

Solve the system of equations using substitution. 3x + 2y = 7 y = –3x + 11

Mathematics
1 answer:
Maksim231197 [3]3 years ago
4 0
<span>3x + 2y = 7
y = –3x + 11

replace </span>y = –3x + 11 into 3x + 2y = 7 

3x + 2y = 7 
3x + 2(–3x + 11) = 7
3x -6x + 22 = 7
-3x = 7 - 22
-3x = -15
x = 5

<span>y = –3x + 11
y = -3(5) + 11
y = -15 + 11
y = -4

x = 5 and y = -4

answer: </span><span>D. (5, –4)</span>
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a student worked out at the gym continuously for 50 minutes. The graph shows the remaining percentage of the workout f(x) as a l
SashulF [63]

Answer:

Domain: All real numbers greater than or equal to 0 and less than or equal to 50

Range: All real numbers greater than or equal to 0 and less than or equal to 100

Step-by-step explanation

The workout is at 100% at 50 mins. Anything less would be under these two numbers.  Since the percentage of workout is on the y-axis, anything between zero and 100 can be possible. The time is on the x-axis, so anything 0 to 50 can be possible.  

8 0
3 years ago
[solve each equation for the indicated variable]<br> 2A=πr2 for π
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Answer:

π = 2A/ r²

Step-by-step explanation:

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7 0
2 years ago
Enter the value of 12x-2 when x = 3.
alina1380 [7]

Answer:

34

Step-by-step explanation:

12(3)-2

36-2

34

3 0
2 years ago
Read 2 more answers
Interpreting Solutions:
Darina [25.2K]
We have that
solution is
x <-10 or x>=25

for
x < -10
the solution is the interval (-∞, -10)

and 
for 
x>=25
the solution is the interval [25,∞)

therefore
the solution for
x <-10 or x>=25
is
(-∞, -10)  ∪ [25,∞)

<span>the solution is any value of x less than -10 or greater than or equal to 25</span>
6 0
3 years ago
Read 2 more answers
An automobile insurance company divides customers into three categories: good risks, medium risks, and poor risks. Assume that o
Leokris [45]

Answer:

0.60

Step-by-step explanation:

Probability that the customer is not a poor risk = 1 - probability that the customer is a poor risk

Firstly, let’s calculate the probability of being a poor risk.

From the given data the number of poor risks = 14229-7362-1190 = 5677

So the probability of being a poor risk = 5677/14229 = 0.399

Thus, the probability that the customer is not a poor risk = 1-0.399 = 0.601 which to 2 decimal places = 0.60

6 0
3 years ago
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