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ruslelena [56]
3 years ago
6

Solve 4x^2+8x-5=0 Using the correct method. Show the steps of your work, and explain why you chose the method used

Mathematics
1 answer:
9966 [12]3 years ago
7 0
Which method are you using 
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Please help please<br> e
dezoksy [38]

Answer:

a) 4410

b) 4189.5

Step-by-step explanation:

To find the volume of the pool, multiply the length, width, and depth:

21*35*6=4410ft^3

95% capacity would be equal to 0.95*4410=4189.5ft^3

6 0
3 years ago
Read 2 more answers
June bought three books. For the first book, she paid one half of her allowance plus $1 more. For the second book, she paid one
inysia [295]

Answer:

$34

Step-by-step explanation:

I'd work backwards.

For the third book, she paid all her remaining money. The problem says she paid "1/2 her leftover money + $3". This means that: (let m = money used to buy book 3)

m = 1/2m + 3

1/2m = 3

m = 6

For the second book: (let n = money before book 2)

n - m (money left after book 2) = 1/2n + 2

1/2n +2 is money used up for book, which is the same as n-m.

n = 1/2n + 2 + m

1/2n = 2 + m = 2 + 6

1/2n =8

n = 16

For the first book, she spent 1/2 her money + 1. If o = money before book 1 (or the whole allowance):

o - n = 1/2o + 1

o = 1/2o + n + 1 = 1/2o + 16 + 1

1/2o = 17

o = 34

Check!

Spent 17 (half 34) + 1 on book 1

16 left

Spent 8 (half 16) +2 on book 2

6 left

Spent 3 (half 6) + 3 on book 3

0 left

4 0
2 years ago
Which statements describes this trapozoid?
Anna11 [10]

A trapezoid/trapezium is a quadrilateral (4 sided shape) with exactly one pair of parallel sides.

It is a quadrilateral (a closed plane shape with four linear sides) that has at least one pair of parallel lines for sides

4 0
3 years ago
Simplify. <br> Cos ^-1 (square root 3/2
bogdanovich [222]
Hello,

As
cos(30)=sin(60)=\dfrac{\sqrt{3} }{2}\\\\&#10;&#10;cos^{-1}(\dfrac{ \sqrt{3} }{2})&#10;

=π/6+2kπ or -π/6+2kπ
4 0
3 years ago
Kelsey babysits and earns a lat rate of $10 plus $1.50 per hour. How many hours did she babysit if she earned $16? (Write and so
Tasya [4]

Answer:

She babysitted for 4 hours.

Step-by-step explanation:

1.50x + 10 = 16

1.50x = 6

x = 4

Hope this helps!

6 0
2 years ago
Read 2 more answers
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