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enot [183]
3 years ago
11

Explain how to solve this system algebraically

Mathematics
2 answers:
gulaghasi [49]3 years ago
4 0

Answer:

take the -12 to behind the equal and replace with 0 then solve the polynomial

garik1379 [7]3 years ago
4 0
4x-2y=-12.....I
2x-y=-6.......II

2x+6=y......iii

From eqn I
4x-2(2x-y)=-12
or,4x-4x+2y=-12
or,2y=-12
Y=-6

In eqn iii
2x+6=-6(y=-6)
or,2x=-12
X=-6
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3 years ago
A coin purse contains d dimes and q quarters. There are 35 coins in the purse, and the total value of the coins is $5.60. Create
pogonyaev

Answer:

14 dimes, 21 quarters

Step-by-step explanation:

Represent dimes with d and quarters with q.

So: 35 coins means

d + q = 35

1 dime = $0.10 and 1 quarter = $0.25. So, a value of $5.60 means

0.10d + 0.25q = 5.60

So, the system of equations is:

d + q = 35

0.10d + 0.25q = 5.60

Make d the subject in d + q = 35

d = 35 - q

Substitute 35 - q for d in 0.10d + 0.25q = 5.60

0.10d + 0.25(35 - q) = 5.60

Open bracket

0.10d + 8.75 - 0.25q = 5.60

Collect Like Terms

0.10d - 0.25q = 5.60 - 8.75

-0.15q = -3.15

Solve for q

q = \frac{-3.15}{-0.15}

q = 21

Substitute 21 for q in d = 35 - q

d = 35 - 21

d = 14

7 0
3 years ago
I need help please help
erastovalidia [21]

Answer:

x = 57*

Step-by-step explanation:

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180 - 123 = 57

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Step-by-step explanation:

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Let's change it by multiplying by 10^6.

So, the number is:

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For scientific notation, we have to take the decimal point until there is 1 digit to its left.

Thus it will be:

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Well, that's 7 digits. Thus, the scientific notation would be:

8.284\times10^7^{}

8 0
1 year ago
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