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Natasha_Volkova [10]
3 years ago
12

Help me! solve for y

Mathematics
1 answer:
dsp733 years ago
5 0

Answer:

\sqrt{7}i or -\sqrt{7}i

Step-by-step explanation:

square root both sides of the equation

since you can't sqrt a negative number, you substitute sqrt of -1 to i

Which gets the answer.

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Which of these rectangles could be the shape of her scrap book cover?
andrew11 [14]

Answer:

6in 5in

you have to do 5×2 and 6×2 and add those together

3 0
2 years ago
Read 2 more answers
A tree is 10 ft 3 in. tall. To find the height of a tower, the shadow of the tree and the shadow of the tower were measured. Wha
ella [17]

the answer is 41 because you cross multiply then divide by 8.5 and get the answer

\frac{10.25}{8.5}  =  \frac{x}{34}

8 0
3 years ago
Please show work for both problems
kirill [66]

Answer:

3)  x = 15; 95 and 85      4)  x = 12; 98 for both angles

Step-by-step explanation:

2x + 65 + 3x + 40 = 180       Set the equations equal to 180

5x + 105 = 180                      Combine like terms

     - 105  - 105                      Subtract 105 from both sides

5x = 75                                  Divide both sides by 5

x = 15

Plug 15 into both equations

2(15) + 65 = 95

3(15) + 40 = 85

4)  5x + 38 = 9x - 10             Set the equations equal to each other

  - 5x          - 5x                    Subtract 5x from both sides

 38 = 4x - 10

+ 10       + 10                         Add 10 to both sides

48 = 4x                                  Divide both sides by 4

12 = x

Plug 12 into both equations

5(12) + 38 = 98

9(12) - 10 = 98

6 0
3 years ago
The accompanying table shows the number of bacteria present in a certain culture over a 4 hour period, where x is the time, in h
Vlad [161]

Answer:

Step-by-step explanation:

I really hope you know how to use your calculator to find regression equations, because in this forum it is impossible to teach you how to do that. I ran the data through my calculator and got the exponential equation as

y=1963.56(1.14)^x which means at 4 hours, we started with 1963 bacteria and it is growing at a rate of 114% each hour. Since we started out with an x value of 0, and that value represents the number of bacteria after 4 hours, then time 0 is 4 hours, which means that time 12 is 16 hours. We replace the x in the equation with a 12 and do the math:

y=1963.56(1.14)^{12 which gives us, in the end,

y = 9460

4 0
3 years ago
Music lessons cost$20 pretty week how much do 6 weeks cost
joja [24]
6 weeks × 20 dollars = $120
4 0
3 years ago
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