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Jlenok [28]
3 years ago
9

What are the solutions to x^2 + 4 = -6x?

Mathematics
1 answer:
Korvikt [17]3 years ago
4 0

Answer:

Step-by-step explanation:

x² + 4 = -6x

x² + 6x + 4 = 0

quadratic formula

x = [-6±√(6²-4·1·4)]/[2·1] = [-6±√20]/2 = [-6±2√5]/2 = -3±√5

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Joey decides to empty his piggy bank and count his money. His bank is filled with only nickels and dimes. Joey counted a total o
xxTIMURxx [149]

Answer:

Joey has 18 nickles and 27 dimes in his piggy bank.

Step-by-step explanation:

1 nickle = 5 cents

1 dime = 10 cents

$1 = 100 cents

$3.15 = 135 cents

Let

n represent the number of nickles, n>=0

d represent the number of dimes, d>=0

Joey counted a total of 45 coins that added up to $3.15:

n + d = 45

5n + 10d = 315

n = 18 nickles

d = 27 dimes

5 0
2 years ago
What is the area of a rectangle with a length of 5/8foot and a width of 4/9 foot?
VLD [36.1K]
The answer is 20/72 or 5/18
5 0
3 years ago
12 chickens lay 30 eggs how many eggs per chicken
algol13
10 chickens lay 2 eggs each. But 2 chickens lay 3 eggs each
4 0
3 years ago
Read 2 more answers
Can anyone rewrite the quadratic function in standard form?
yulyashka [42]

Answer:

Step-by-step explanation:

y=3(x-3)(x-4)

=3(x²-4x-3x+12)

or y=3(x²-7x+12)

or y=3x²-21x+36

5 0
2 years ago
Read 2 more answers
20 points if you help
Talja [164]

A

The first equation has slope 6 and y intercept -4.  I'd plot y intercept (0,-4) and (1,2), and connect the dots and extend for the first line.

The second equation has slope 5 and y intercept -3.  I'd plot y intercept (0,-3) and (1,2), and connect the dots and extend for the second line.

We stumbled on the solution, both lines contain (1,2)

B

I don't like the graphing.  This is algebra, not connect the dots.

We have two equations for y, we equate them to find the x where they meet.

6x - 4 = 5x - 3

6x - 5x = -3 + 4

x = 1

y = 6(1) - 4 = 2

Check:  y = 5(1) - 3 = 2, good

Answer: (1, 2)

4 0
3 years ago
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