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Zinaida [17]
4 years ago
5

Solve equation. X^2-4x-12 = 0

Mathematics
1 answer:
ser-zykov [4K]4 years ago
5 0

Answer:

Step-by-step explanation:

x2 - 4x - 12 = 0

x2 - 6x + 2x - 12= 0

x(x - 6) + 2(x - 6) = 0

x + 2 = 0

x = - 2

x - 6 = 0

x = 6

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Brilliant_brown [7]

Answer: so the answer is -9 + 23*7 =  152  

Step-by-step explanation:  a24  = a1 + (24-1)d    where a1 = -9 and d = common difference ( 12-5 = 7)  

Hope this helped :D

7 0
3 years ago
Mr. Rogers has $4.62. He has 3 times as many dimes as nickels and 6 more pennies than dimes. How many coins of each kind does he
Marysya12 [62]
Let’s make x = # of nickels. Then 3x = # of dimes and 3x+6 = # of pennies. A nickel is 5 cents, a dime is 10 cents and a penny is 1 cent.

The money she has should be .05(x) + .10(3x) + .01(3x+6) = 4.62 or to make it simpler: 5(x) + 10(3x) + 1(3x+6) = 462.

5x + 30x + 3x + 6 = 462

38x + 6 = 462

38x = 456

x = 12.

So she has 12 nickels (12 * $0.05 = $0.60), 36 dimes (36 * $0.10 = $3.60) and 42 pennies (42 * $0.01 = $0.42). $3.60 + $0.60 + $0.42 = $4.62.
3 0
4 years ago
The distance light travels in one year is known as a light year. A light year is equal to 5.87 × 1012 miles. The closest that Ea
pashok25 [27]

Answer:

6.21\times 10^{-5}\ \text{light years}

Step-by-step explanation:

The distance light travels in one year is known as a light year.

1\ \text{light year}=5.87\times 10^{12}\ \text{miles}

The closest that Earth ever gets to Jupiter is 3.65\times 10^8\ \text{miles}

3.65\times 10^8\ \text{miles}=\dfrac{1}{5.87\times 10^{12}}\times 3.65\times 10^8\ \text{light years}\\\\=6.21\times 10^{-5}\ \text{light years}

Hence, the distance it will take light to travel from Earth to Jupiter at this distance is 6.21\times 10^{-5}\ \text{light years}

4 0
3 years ago
Read the sentence. To survive intense cold, explorers in cold places wear clothing made of special materials. Which phrase is th
lesya692 [45]
<span> The answer is C because its the only one with to in front of the phrase.</span>
8 0
3 years ago
Read 2 more answers
Eight more than twice a number increased by 3 is equal to 79. Find the number
iren2701 [21]

translate, call the number, n

Eight more than (8+) twice a number increased by 3 (2(n+3)) is equal to (=) 79 (79)


8+2(n+3)=79

minus 8 both sides

2(n+3)=71

divide both sides by 2

n+3=35.5

minus 3 both sides

n=32.5

the number is 32.5

7 0
4 years ago
Read 2 more answers
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