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3 years ago

Solve the quadratic equation y^2 −10y+21=0 y=?

Mathematics

1 answer:

Firdavs [7]3 years ago

8 0

Answer: y = 3 or y=7

Step-by-step explanation:

$y^{2} -10y+21$

what 2 factors of 21 can equal 10 when added together (1*21- no 3*7- yes)

Factor

$(y-3)(y-7)$

y-3=0

y=3

or y-7=0

y=7

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F(x) = 2x + 3<br> What function is this

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What is the equation of a line, in general form, that passes through point (1, -2) and has a slope of 1/3.

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Step-by-step explanation:

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3 years ago

Hey i need help! no stupid answers!

Ahat [919]

Your first equation would be:
65 + 3x - 10 + 2x = 180
Then simplify to get:
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3 years ago

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Question 7 of 10

Ganezh [65]

Answer:

Option B

Step-by-step explanation:

Given Equation :

$\qquad \sf \dashrightarrow \: 3(4x+3) = 2x - 5(3 - x) + 2$

Using distribute property:

$\qquad \sf \dashrightarrow \: 12x + 9 = 2x - 15 + 5x + 2$

Adding the like terms we get :

$\qquad \sf \dashrightarrow \: 12x + 9 = 2x + 5x - 15 + 2$

$\qquad \sf \dashrightarrow \: 12x + 9 = 7x - 13$

Transposing the variables on the right side and constant terms on the left side :

$\qquad \sf \dashrightarrow \: 12x - 7x = - 13 - 9$

$\qquad \sf \dashrightarrow \: 5x = - 22$

Dividing both sides by 5 :

$\qquad \sf \dashrightarrow \: \dfrac{5x}{5} = \dfrac{ - 22}{5}$

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3 0

3 years ago

HELP I NEED HELP ASAP

victus00 [196]

Answer: (5, -2)

Step-by-step explanation:

$y= x-7\\2x+y=8$

Substitute x-7 for y in 2nd equation

$2x+ x-7 =8\\3x-7=8\\3x = 15\\x=5$

Solve for y

$y=5-7\\y=-2$

8 0

3 years ago