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pogonyaev
3 years ago
14

If y = 4x, what is y if the x = 5?

Mathematics
1 answer:
Helga [31]3 years ago
8 0

Answer:

its should be 20

Step-by-step explanation:

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The number of fish in a lake decreased by 25% between last year and this year. Last year there were 60 fish in the lake. What is
Advocard [28]

Answer:

15

Step-by-step explanation:

3 0
3 years ago
LaToya has $113.94 in her checking account. During the week she goes to an ATM and withdraws $40. She is charged a usage fee of
Scilla [17]
113.94-42.50+189.73-22.50-70.18= $168.49

LaToya has $168.49 in her checking account
8 0
3 years ago
Read 2 more answers
Please help!<br><br> If sin(xº)=cos(yº) find k if x=2k+3 and y=6k+7
USPshnik [31]

answer

10

step-by-step explanation

the equation given is sin(x) = cos(y) with x = 2k + 3 and y = 6k + 7

substitute in 2k+ 3 for x in sin(x) and substitute in 6k + 7 for y in cos(y)

sin(x) = cos(y)

sin(2k + 3) = cos(6k + 7)

we know that sin(x) = cos(90 -x)

sin(2k + 3)

= cos(90 - (2k + 3) )

= cos(90 - 2k - 3)

= cos(87 - 2k)

substitute this into the equation sin(2k + 3) = cos(6k + 7)

sin(2k + 3) = cos(6k + 7)

cos(87 - 2k) = cos(6k + 7)

87 - 2k = 6k +7

80 = 8k

k = 10

7 0
3 years ago
Please help me!!!!!!!! Factor z2 – 3z – 18
Vladimir [108]
First, the factor pairs for 18 are:
1, 18
2, 9
3, 6

Since the middle term is -3, the two factors must be 3 apart. The only pair that is 3 values apart is 3, 6.
Since the middle value is negative, the larger number is negative. This means that the 6 is negative.
z = -6
z = 3

Set each equal to 0;
z = -6
z + 6 = 0

z = 3
z - 3 =0
So your factors are (z+6) and (z-3), or answer B.
4 0
3 years ago
What is 400000, 13000, 1100, 4 ones in standard form
Lesechka [4]

413,114

i think... lol

4 0
3 years ago
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