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Vladimir [108]
2 years ago
13

Factorise the following quadratic expressions; 6a-18a21x -3x²1/16 - p²25v²-1​

Mathematics
1 answer:
Lubov Fominskaja [6]2 years ago
3 0

Answer:

− 12 a

3 x ( 7 − x )

( 1 4 + p ) ( 1 4 − p )

( 5 v + 1 ) ( 5 v − 1 )

Step-by-step explanation:

I think these are the right answers

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Is 4.5 and 0.25 proportional
jeyben [28]

Answer: no

Step-by-step explanation:

450% and 25% are different.

3 0
2 years ago
5x + 7y = 25<br> 5x - 2y = -65<br> solve using elimination<br> (step by step please)
aliina [53]

5x+7y=25

5x-2y=-65

subtract both of the equations

5x-5x=0

7y--2y= 7y+2y=9y

25--65=25+65=90

0+9y=90

9y=90

divide both sides by 9 to get y by itself

9y/9=90/9

cross out 9 and 9 which becomes 1*1*y=y

90/9=10

y=10

find x by using the substitution method

5x+7y=25

5x+7(10)=25

5x+70=25

move +70 to the other side

sign changes from +70 to -70

5x+70-70=25-70

5x=-45

divide both sides by 5 to get x by itself

5x/5=-45/5

cross out 5 and 5 then becomes 1*1*x=x

-45/5=-9

x=-9

answer:

(-9,10)

6 0
3 years ago
Please answer it now in two minutes
Nikitich [7]

Answer:

3√6

Step-by-step explanation:

tan60=opp/adj

opp(d)=tan60*3√2=√3*3√2=3√6

7 0
3 years ago
Evaluate 2x - y + 4z, if x = 1, y = 2 and z = -1
lidiya [134]

2 x 1 - 2 + 4 x -1 =

the answer is -4.

5 0
3 years ago
if you wish to calculate the interest on an investment with a rate of 6.17%, what number will you plug into your equation?
Kitty [74]
The number used for the interest rate will be 6.17% in decimal form: 0.0617.
3 0
3 years ago
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