3 years ago

What is 4(a)(c)? Calculate the answer.

Mathematics

1 answer:

Anna71 [15]3 years ago

5 0

Answer: -20

4(5)(-1)=-20

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20x^2-30=4x solve for x

ankoles [38]

Answer:

x=1.3288 or -1.1288

Step-by-step explanation:

Given $20x^{2}-30=4x$

Subtract 4x from both sides

$20x^{2}-4x-30=0$

Since we can factor out 2 from whole equation, let's factor out 2.

$2(10x^{2}-2x-15)=0$

Divide with 2 on both sides

$10x^{2}-2x-15=0$

We got the quadratic equation, we can solve for x using quadratic formula.

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

$x=\frac{2\pm\sqrt{2^{2}-4X10X(-15)} } {2X10}$

$x=\frac{2\pm\sqrt{604} }{20}$

$x=\frac{2\pm2\sqrt{151}}{20}$

$x=1.3288or-1.1288$

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3 years ago

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snow_lady [41]

I think D because don't proportional lines go straight or sum

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2 years ago

If f(x)=6x^2+4x-11, then f(-5)=?

olya-2409 [2.1K]

F(-5)=6(5*5)+4(-5)-11
f(-5)=6(25)+-20+-11
f(-5)=150+20-11
f(-5)=130-11=119

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3 years ago

Luke wants to raise $175 for a school fundraiser. She had raised $120 so far. How much more does she need to reach her goal

irina1246 [14]

55 dollars and is Luke a girl

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3 years ago

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On Monday, Jullo ran 39 miles. On Tuesday, he ran another

Artist 52 [7]

<h3>Answer:</h3>

67 miles

<h3>Step-by-step explanation:</h3>

On Monday, Jullo ran <u>39 miles.</u>

⇒ Monday = 39 miles

On Tuesday, he ran <u>24 miles.</u>

⇒ Tuesday = 24 miles

On Wednesday, he ran <u>4 miles.</u>

⇒ Wednesday = 4 miles

<u>Finding the total miles:</u>

Total miles ran on Monday, Tuesday, and Wednesday = 39 + 24 + 4

= 67 miles

6 0

1 year ago