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Kitty [74]
3 years ago
11

Mr. Boyle replaced 25% of the boards on his wooden deck. If he replaced

Mathematics
2 answers:
Yakvenalex [24]3 years ago
8 0
76. If 19 boards is 25% then 19x4 will give you the amount of boards that is 100%
Daniel [21]3 years ago
3 0
76
Explanation: if that’s 25% then you have to multiply it by 4 because if you multiply 25 times 4 then it would equal to 100%
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What are the roots of this quadratic equation? 3x^2+10=4x
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Step-by-step explanation:

The root of an equation is when x=0.

We need to rewrite this as 3x²-4x+10=0.

The quadratic formula is

(-b+or-sqrt(b²-4ac))/2a

so 4+or-sqrt(16-120)/2a

since the sqrt can no be negative this answer will have imaginary numbers.

(4+2i sqrt(26))6 and (4-2i sqrt(26))6

simplified is

x=(2+i sqrt(26))/3 and x=(2-i sqrt(26))/3

6 0
3 years ago
PLEASE HELP ME THIS IS DUE TODAY, I NEED HELP!!!!!!
natita [175]

Answer:

I will explain in comments I just want some points for helping you.

Step-by-step explanation:

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4 0
3 years ago
How much should Tabatha budget monthly for insurance that costs $956.89 for the entire year?
elixir [45]
$79.74083  is the answer hope i help you

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5 0
3 years ago
A couple needs $55,000 as a down payment for a home. If they invest the $40,000 they have at 4% compounded quarterly, how long w
slava [35]

Answer:

8 years

Step-by-step explanation:

Compound interest formula

A(t)= A_0(1+\frac{r}{n})^{nt}

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divide both sides by 40000

1375=(1+\frac{0.04}{4})^{4t}

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Take ln on both sides

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divide both sides by ln(1.01)

\frac{ln 1375}{ln 1.01}=4t

Divide both sides by 4

t=8.00108

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8 0
3 years ago
Two athletic directors purchased tennis balls and baseballs at the same store. The first athletic director bought 5 tennis balls
Setler79 [48]
The price of a baseball is $3.75. This problem can be solved using an elimination between two equation with two variables in it which are, 5x + 3y = 23.75 and 2x + 7y = 31.25. First, multiply the first equation by 2 and the second equation by 5 which resulting in 10x + 6y = 47.5 and 10x + 35y=  156.25 and then eliminate the x variable resulting in 29y = 108.75. The baseball price can be acquired from this equation (y = 3.75) because y variable represents the baseball price.
6 0
4 years ago
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