4 years ago

Graph the line with slope -3 passing through the point (1,5).

Mathematics

1 answer:

vitfil [10]4 years ago

6 0

$y = -3(1) + 5$
aka Y= -3/1x + 5

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Solve for x in the equation 2 x squared + 3 x minus 7 = x squared + 5 x + 39.

Nastasia [14]

Answer:

$\implies x=1\pm \sqrt{47}$

Step-by-step explanation:

We want to solve for x in $2x^2+3x-7=x^2+5x+39$

You need to group and combine like terms and write in standard form:

$2x^2-x^2+3x-5x-7-39=0$

$\imples x^2-2x-46=0$

By comparing to $ax^2+bx+c=0$ , we a=1,b=-2 and c=-46

The solution can be obtained using the quadratic formula.

$x=\frac{-b\pm \sqrt{b^2-4ac} }{2a}$

We substitute the coefficients to get:

$x=\frac{--2\pm \sqrt{(-2)^2-4*1*-46} }{2*1}$

$x=\frac{2\pm \sqrt{4+4*46} }{2}$

$x=\frac{2\pm \sqrt{4*47} }{2}$

$x=\frac{2\pm2\sqrt{47} }{2}$

$\implies x=1\pm \sqrt{47}$

The last choice is correct

5 0

3 years ago

Read 2 more answers

Jim adds 20 to it, then doubles it and gets an answer of 99.2. What was the original number?

riadik2000 [5.3K]

(n+20)*2 = 99.2

distribute

2n + 40 = 99.2

subtract 40 from each side

2n = 59.2

divide each side by 2

n = 29.6

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3 years ago

Peyton has 12 yards of ribbon. She cut the ribbon into pieces that were 1/6 yard each. How many pieces of ribbon does she have n

Lapatulllka [165]

12 divided by 1/6
Change division to multiplication and do reciprocal of 2nd number

12/1. X. 6/1= 72 pieces

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4 years ago

Please help if you know it.

Lostsunrise [7]

Answer:

$\frac{16n^{6} }{m^{9} }$ is the answer

Step-by-step explanation:

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3 years ago

What is the interest earned at $1800 at 6.5% for 30 months

forsale [732]

30 months is 2.5 years. Therefore,

i = p*r*t becomes i=$1800*0.065)*(2.5) = $292.50 (answer)

6 0

3 years ago