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Kruka [31]
2 years ago
11

Answer this please it’s for geometry test

Mathematics
1 answer:
Anna [14]2 years ago
3 0

Answer:

D

Step-by-step explanation:

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The sum of two numbers is 21.
mafiozo [28]

Answer:

Pretend that x and y represents the 2 numbers that we need to find.

According to the information, we know that:

x + y = 21

6x = y

Replace y in the first equation with 6x (because they are equal to each other according to the second equation):

x + y = 21

x + 6x = 21

7x = 21

x = 21/7 = 3

Now have two ways to find y, both will give us the same result:

3 + y = 21 ⇔ y = 21 - 3 = 18

6 · 3 = y ⇔ y = 18

So the numbers that we need to find are 3 and 18.

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3 years ago
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1. Find a if x³ + ax² - x -8 is divisible by x -1​
Amanda [17]

Answer:

a = 8

Step-by-step explanation:

x-1 = 0

x = 1

let x³ + ax² -x -8 be p(x)

hence, p(1) = (1)³ + a(1)² -1 -8 = 0    (since, x-1 is a factor)

= 1 + a - 1-8

= a - 8 = 0

therefore, a = 8

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2 years ago
Let v=-3sqrt2i-4sqrt2j, find a unit vector that points in the opposite direction
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Idk I think be v~14 * 72
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3 years ago
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Give two ways to write 15-b in algebraic expression in words
weqwewe [10]

Hey there!!

Word expressions for 15 - b :

( 1 ) b is subtracted from 15

( 2 ) 15 is added to negative b

( 3 ) 15 minus b

( 4 ) 15 reduced by b

Here are some ways I would write these expressions as , choose 2 equations for your answer...

Hope my answer helps!!


5 0
3 years ago
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