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romanna [79]
4 years ago
10

Can someone figure this out for me and tell me how you got the answer please!!

Mathematics
1 answer:
Tom [10]4 years ago
7 0

Answer:

24.03 feet

Step-by-step explanation:

tan(59⁰)=40/x

          x=40/tan(59°)

          x=24.03

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the sum of three numbers is twenty. the second number is four times the first and the sum of the first and third is eight. what
8090 [49]
Let's call the three numbers x, y, and z. 


The numbers are 3, 12, and 5.
x + y + z = 20
y = 4x
x + z = 8
We can rewrite the first equation because y is 4x, so 
x + 4x + z = 20
5x + z = 20
And now we can use simultaneous equation rules to solve

5x + z = 20
x + z = 8

5x + z = 20
5x + 5z = 40
(subtract)
-4z + -20
÷ -4
z = 5

x + z = 8
x + 5 = 8
x = 3

y = 4x
y = 4 × 3
y = 12

I hope this helps!
4 0
3 years ago
Write the equation of a line that is perpendicular to y=-2/7x + 9 and that passes through the point (-4,6) [FP]​
siniylev [52]

Answer:

$y=(7/2)x+20$

Step-by-step explanation:

SInce the gradient of the first line is $-2/7$ then the gradien of the perpendicular line is $7/2$.

Therefore by the point slope formula the line that we are looking for is

$y-6=(7/2)(x+4)$

$y=(7/2)x + 20$

7 0
3 years ago
Cressida decided to save a part of her income in a savings account that compounds interest every four months. Her account balanc
hichkok12 [17]
The answer is "<span>the number of times the account compounds interest</span>".
The general formula is the following:
3,545(1+r)^n
wherein r is the interest rate compound each four months. 
Since there is 3*4 months in a year, then each year we compute the interest Three time, there where the factor 3 comes. 
6 0
3 years ago
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which of the given expressions are equivalent?select all that apply.3z+2z and 5z, {8x-8x}-y and 0,9.1 +4.5a-2.5a and 11.1a,-7y[3
Basile [38]
3z+2z and 5z     9.1+4.5a-2.5a and 11.1a       and y-6(3) and y-18
6 0
3 years ago
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I need to know the area of this triangle and I would like to have an explanation because I dont know how to do it I know the for
Anna [14]

Answer: 69

Step-by-step explanation:

5 0
3 years ago
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