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kkurt [141]
2 years ago
10

Explain how to decide whether to use graphing, substitution, or elimination to solve a system of equations.

Mathematics
1 answer:
Bess [88]2 years ago
4 0
It depends on the systems of equations. I would stay away from elimination, go for substitution and graph only if asked.
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WILL GIVE BRAINLIEST TO CORRECT ANSWER
Aliun [14]

Answer:

Total number of outcomes = 23

number of biology and art students = 2

number of biology students = 2

Since it is given that all the students study art,

number of possible outcomes = 2

probability = number of favorable outcomes/number of total outcomes.

= 2/23

Therefore probability that the selected student studies both art and biology is 2/23.

7 0
3 years ago
Find the difference <br><br><br>-2(c + 2.5) - 5(1.2c + 4)​
Vikentia [17]
Answer:
|−∣=7
Explanation:

∣−∣
= |(-2-5)|
= |-2-5|
= | -7|=7
8 0
2 years ago
4+b = -30<br> What is the value of X?<br><br> X= -34<br> X= 7.5 <br> X=120<br> X= -26
Firdavs [7]

Answer:

X= -34

Step-by-step explanation:

6 0
3 years ago
Pls answer quick I will give bainlyest to first GOOD answer
Helen [10]

Answer:

R1 - given

R2 - subtraction property of equality

R3 - distribution

S4 - 9x = 61

R5 - division prop. of equality

Step-by-step explanation:

hope this helps :)

5 0
3 years ago
Over the last three evenings, Diane received a total of 105 phone calls at the call center. The third evening, she received 4 ti
sergij07 [2.7K]

Answer:

Make an eqaution from here.
Let’s make evening 2 “x”

So the first evening has 9 less then the secon evening so…
x-9
Of course theres the second evening (x).

X-9+x
Then the third evening has 4 times as much as the second meeting so…
x-9+x+4x

And when solved, it has to equal 105.

So solve from here.
Combine like terms.

6x-9=105
Isolate

6x=114
x= 19

First evening is 9 less then 19, so 10.

The second evening was 19 calls.
The third evening was 4 times the second evening so, 19*4= 76

1st night = 10

2nd night= 19 calls
Thrid night= 76 calls

8 0
2 years ago
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