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iragen [17]
4 years ago
12

When using the substitution method for solving a system of linear equations in two variables, what should be the first step?

Mathematics
1 answer:
Yuri [45]4 years ago
8 0
The first step would be to isolate a variable (solve for a variable)....so u will have something to sub into the other equation
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In a class in which the final course grade depends entirely on the average of four equally weighted 100-point tests, Harold has
qaws [65]

Answer:

Between 19 and 55, inclusive

Step-by-step explanation:

70 < Average < 79 (inclusive)

4×70 < sum < 4×79 (inclusive)

280 < sum < 316

280 < 92 + 84 + 85 + X < 316

280 < 261 + X < 316

19 < x < 55

Fourth score can be between 19 and 55, inclusive

5 0
3 years ago
A captain and a co-captain are randomly selected from the 12 members of a fencing team. Determine the probability that Lauren is
Lilit [14]

I'm not 100% sure of this  I think its as follows:-

Prob(Lauren then Isabel picked)  = 1/12 * 1/11 = 1/132 



4 0
3 years ago
Read 2 more answers
Write the sum or difference in the standard form a + bi.
REY [17]

Answer:

Sum = 13+ 4i            Difference = -5 - 8i

Step-by-step explanation:

Given complex number as (4 -2i)  and  (9 + 6i)

Sum of these complex number is

(4 -2i)  + (9 + 6i) = ( 4 +9) + (6i -2i)

                           = 13 +4i

Difference of these complex number is

(4 -2i)  - (9 + 6i) = (4 -9) - (2i +6i)

                        = -5 - 8i

Hence the sum and Difference of given complex numbers are

Sum = 13+ 4i            Difference = -5 - 8i              Answer

8 0
4 years ago
Please help lol. In ISS and cant solve
Ostrovityanka [42]

Answer:

Anthony is right

Step-by-step explanation:

I answered your other problem so look there for the explanation

4 0
1 year ago
Read 2 more answers
Eric is looking to go shopping, as he knows he needs more ties and shirts. Eric is looking for his ties and discovers that he cu
mars1129 [50]
<h2>1 way</h2>

For 20 shirts Eric has

20×2=40 ties

After shopping Eric has 50 shirts

So

20 shirts 50 shirts

40 ties x ties

\frac{20}{40}  =  \frac{50}{x} \\ x =  \frac{50 \times 40}{20}  \\ x = 100

Answer: He would have 100 ties

<h2>2 way</h2>

If he has 2 ties for 1 shirt he will have

2×20=40 ties for 20 shirts, so for 50 shirts ge would have

50×2=100 ties

Answer: He would have 100 ties

4 0
3 years ago
Read 2 more answers
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