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3 years ago

Given: 4n^2 + 25 = -20x, what is the value of the discriminant?

Mathematics

1 answer:

worty [1.4K]3 years ago

4 0

I hope this helps you

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What is the quotient (6x4+15x3+10x2+10x+4) ÷ (3x2 + 2)?

Elza [17]

We want to evaluate
$\frac{6x^{4}+15x^{3}+10x^{2}+10x+4}{3x^2+2}$

Perform long division
2x² + 5x + 2
----------------------------------------
3x²+2 | 6x⁴ + 15x³ + 10x² + 10x + 4
6x⁴ + 4x²
----------------------------------------
15x³ + 6x² + 10x + 4
15x³ + 10x
---------------------------------------
6x² + 4
6x² + 4

Answer: 2x² + 5x + 2

3 0

3 years ago

Lee watches TV for 2 hours per day. During that time, the TV consumes 250 watts per hour. Electricity costs (10 cents)/(1 kilowa

vladimir1956 [14]

Answer:

$1.5

Step-by-step explanation:

Lets us first calculate energy consumed by TV in 30 days.

Energy consumed by TV in one hour : 250 watts.

TV operated 2 hours a day

so energy consumer by TV in a day = 250 * 2 watts = 500 watts hour

Energy consumed by TV in 30 day = energy consumer by TV in a day * 30

= 500*30 watts = 15,000 watt-hour

Convert total energy consumed in kilo watt hour

we know that one kilowatt hour = 1000 watt-hour

Thus, 15,000 watt-hour = 15,000/1000 kilowatt-hour = 15 kilowatt-hour

________________________________

cost of electricity = 10 cents per kilowatt-hour

cost of electricity for 15 kilowatt-hour = 15* cost of electricity for one kilowatt-hour( which is 10 cents)

=>15*10 = 150 cents

As $1 = 100 cents

hence 150 cents = $150/100 = $1.5 .

Thus, it cost $1.5 to to operate for a month of 30 days.

6 0

3 years ago

WIL GIVE BRAINLIEST PLEASE!!!

Aloiza [94]

Answer:

400

Step-by-step explanation:

just took the test lol

3 0

2 years ago

A frisbee landed on the roof of the house. The place where you have decided to place the ladder is right over the AC unit, forci

artcher [175]

A^2=B^2+c^2

8^2+15^2=X^2

so 289=X^2
the square root or 289 is 17, so the answer is 17ft

7 0

3 years ago

Can someone please help me, Thanks - Alyssa T.

Oxana [17]

A=LW
192=(13+x)((9+x)
192=117+22x+x^2 (subtract 192 from both sides)
x^2+22x-75+0 (factor)
(x+25)(x-3)=0
so x=-25 or 3
Check work
since we are adding x it can only be the positive solution so x=3 so the new dimensions are:
L=13+3=16m
W=9+3=12
check: 16*12=192 so the answer is correct hope this helped

7 0

3 years ago