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AlexFokin [52]
3 years ago
12

What is the first step in solving this system of equations?

Mathematics
1 answer:
DiKsa [7]3 years ago
8 0

Step-by-step explanation:

Multiply the first equation by 7 and the second by 2

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Sat scores have a mean of 500 and a standard deviation of 100. let's contine with the above example: if we wanted a 95% confiden
xz_007 [3.2K]

Answer:

385

Step-by-step explanation:

Given that :

Mean, m = 500

Standard deviation, s = 100

Zcritical at 95% = 1.96

Confidence interval, C2 - C1 ; 510 - 490

Using the relation :

n = (2 * Zcritical * s) / (C2 - C1)

n = sample size

n = [(2 * 1.96 * 100) / (510 - 490)]^2

n = (392 / 20)^2

n = 19.6²

n = 384.16

n = 385

5 0
3 years ago
Can someone please answer the attachment​
dexar [7]

Step-by-step explanation:

linear pair

linear pair

alternate angles.

alternate angles

cointerior angles

I will hope that you like my answer

4 0
3 years ago
A: Complementary
stiv31 [10]

Answer:

Vertical

Step-by-step explanation:

Vertical angles are two nonadjacent angles formed by two intersecting lines.

3 0
1 year ago
Read 2 more answers
NEED HELP FAST PLEASE<br> Evaluate the limit.<br><br> a.4<br> c.1<br> b.2<br> d.limit does not exist
BlackZzzverrR [31]
We have the following limit:
 (8n2 + 5n + 2) / (3 + 2n)
 Evaluating for n = inf we have:
 (8 (inf) 2 + 5 (inf) + 2) / (3 + 2 (inf))
 (inf) / (inf)
 We observe that we have an indetermination, which we must resolve.
 Applying L'hopital we have:
 (8n2 + 5n + 2) '/ (3 + 2n)'
 (16n + 5) / (2)
 Evaluating again for n = inf:
 (16 (inf) + 5) / (2) = inf
 Therefore, the limit tends to infinity.
 Answer:
 
d.limit does not exist
7 0
4 years ago
A concert sold out for 12 performances altogether 8,208 tickets were sold how many tickets were sold for each performance
torisob [31]

Answer:

684

Step-by-step explanation:

Just divide, 8208/12

because 8208 is the number of tickets overall and 12 is how many performances

4 0
3 years ago
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