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svet-max [94.6K]
2 years ago
14

Solve to find the values of a and b.4a + 7b = 389a + 7b = 68​

Mathematics
1 answer:
Nataliya [291]2 years ago
5 0
4a + 7b = 38 -> (1)
9a + 7b = 68 -> (2)

Subtract (1) from (2),
9a - 4a + 7b - 7b = 68 - 38
5a = 30
a = 6
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WILL GIVE BRAINLIEST!!!
torisob [31]
Answer:
A = $2,240.00

(I = A - P = $240.00)

Equation:
A = P(1 + rt)
Calculation:
First, converting R percent to r a decimal
r = R/100 = 3%/100 = 0.03 per year.

Solving our equation:
A = 2000(1 + (0.03 × 4)) = 2240 
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The total amount accrued, principal plus interest, from simple interest on a principal of $2,000.00 at a rate of 3% per year for 4 years is $2,240.00.
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Solve the rational equation x divided by 6 equals x squared divided by quantity x minus 1 end quantity, and check for extraneous
Dmitriy789 [7]

Answer:

Solution: x=-\frac{1}{5},x=0

Step-by-step explanation:

Given:

The rational equation to solve is given as:

\frac{x}{6}=\frac{x^2}{x-1}

Doing cross product, we get:

x\times (x-1)=6\times x^2\\x^2-x=6x^2\\\textrm{Bringing all variables to the right side, we get:}\\6x^2-x^2+x=0\\5x^2+x=0\\x(5x+1)=0\\x=0\ or\ 5x+1=0\\x=0\ or\ x=-\frac{1}{5}

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4 0
3 years ago
Determine the value(s) of k such that the system of linear equations has the indicated number of solutions. (Enter your answers
Ratling [72]

Answer:

k=3

Step-by-step explanation:

The given system of equations are

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Using this we get

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8 0
3 years ago
After four years in college, Josie owes $21000 in student loans. The interest rate on the federal loans is 3% and the rate on th
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Answer:

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Answer:

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