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Elis [28]
3 years ago
13

This was wrong:( plz PLZ ANSWER. only if you are correct tho i CANNOT GET IT WRONG.

Mathematics
1 answer:
const2013 [10]3 years ago
4 0

Answer:

x=40 y=5

Step-by-step explanation:

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Find the fifth term of a geometric sequence for which a3= 20 and r= 2.
Dahasolnce [82]

Answer:

The fith number is 80.

Step-by-step explanation:

A geometric sequence is a group of numbers that are related to it's neighbours by a product of a constant ratio. In order to calculate a certain number in such sequences we can use the formula:

an = a1*q^(n-1)

Where "n" is the position of the number we wish to know and q is the ratio. To use the formula we need to know the first number and we were given the third, so we first need to find that. We have:

a3 = a1*q^(3 - 1)

20 = a1*2^(2)

a1*4 = 20

a1 = 20/4 = 5

So the 5th number is:

a5 = a1*q^(5-1)

a5 = 5*2^(4)

a5 = 5*16 = 80

The fith number is 80.

4 0
3 years ago
3 5<br> What is of = ? Simplify.<br> 8 6<br> -
Verizon [17]
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7 0
3 years ago
Simplify each of the following.<br>5.1. <br><img src="https://tex.z-dn.net/?f=2%20sin%2890%20-%20x%20%29%20-%20cos%28360%20-%20x
yan [13]

Step-by-step explanation:

2 \sin(90 - x)  -  \cos(360 - x)

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6 0
3 years ago
Branliest and Extra Points will be given!!! No explanation needed just the answer plz.
Hitman42 [59]

Right triangle, Pythagorean Theorem:

c² = a² + b²

a=8, b=9

c² = 8² + 9²  = 64 + 81 = 145

c = √145 inches

That's the exact answer but they want us to ruin it with an approximation.

c ≈ 12.041594578792296 inches

Answer: 12

3 0
4 years ago
Three bananas and two oranges sell for $1.25. Five bananas and one orange sell for $1.50.
svlad2 [7]

Answer:

0.25

Step-by-step explanation:

0.25x5=1.25

So, each fruit costs $0.25.

8 0
3 years ago
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