Answer:
y = 7 and x =3
Step-by-step explanation:
use elimination method
so we gonna eliminate y first
9x = 1 - 4y
-7x = -7 + 4y
7| 9x = 1 - 4y
9| -7x = -7 + 4y
63x = 7 - 28y
-63x = -63 + 36y
add eqtn 1 to eqtn2
you will get
0 = -56 + 8y
56 = -56 + 56 + 8y
56 = 8y
56÷8 = 8y÷ 8
7 = y
also eliminate x as we have done wth y
4| 9x = 1 - 4y
4| -7x = -7 + 4y
36x = 4 - 16y
-28x = -28 + 16y
add the two equations
u will get
8x = -24 + 0
8x = -24
8x÷8 = 24÷ 8
x = 3
Answer:
18
Step-by-step explanation:
2:3 x 9
18:27
18 + 27 = 45
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Using the Fundamental Counting Theorem, it is found that Kami could create 40,000 codes that start with an even number.
<h3>What is the Fundamental Counting Theorem?</h3>
It is a theorem that states that if there are n things, each with
ways to be done, each thing independent of the other, the number of ways they can be done is:

In this problem:
- The first digit has to be even, that is, 2, 4, 6 or 8, hence
.
- For the remaining digits there are 10 outcomes for each.
Hence:

Kami could create 40,000 codes that start with an even number.
More can be learned about the Fundamental Counting Theorem at brainly.com/question/24314866
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Answer:
24 girls
Step-by-step explanation:
7 boys plus 8 girls is 15. 45 students / 15 = 3. 3 x 8 girls is 24.