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loris [4]
4 years ago
12

Jim works mowing lawns and babysitting. He earns $9.40 an hour for mowing and $7.70 an hour for babysitting. How much will he ea

rn for 1 hour of mowing and 4 hours of babysitting
Mathematics
1 answer:
tamaranim1 [39]4 years ago
3 0

Answer:

$9.40+$7.70(4)= $40.20

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Law Incorporation [45]

Answer:

t > 28

Step-by-step explanation:

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3 years ago
A machine in a chocolate factory is set to squirt out a predetermined amount of molten chocolate. When the machine is set to x,
frez [133]

Answer:

Sorry I need Points but I also need help

Step-by-step explanation:

3 0
3 years ago
The interest on $2,000 for 2 years is $320. What is the simple interest rate?
umka2103 [35]
R = 8%/year

Equation:
r = (1/t)(A/P - 1)
Calculation:
Solving our equation:
r = (1/2)((2320/2000) - 1) = 0.08
r = 0.08

Converting r decimal to R a percentage
R = 0.08 * 100 = 8%/year

The interest rate required to get a total amount, principal plus interest, of $2,320.00 from simple interest on a principal of $2,000.00 over 2 years is 8% per year.
7 0
3 years ago
Solve the equation<br> 5x+6=2(2x - 3)<br> X=
Serga [27]

Answer:

x =  - 12

Step-by-step explanation:

5x + 6 = 2(2x - 3) \\ 5x + 6 = 4x - 6 \\ 5x - 4x =  - 6 - 6 \\ x =  - 12

7 0
2 years ago
College calculus. I've tried it a couple times but i can't seem to get the right answer
boyakko [2]
The area is the sum of 'n' rectangle areas.
The width of the rectangle is size of interval, (domain size)/n
The height of each rectangle is f(interval) as interval moves along domain.

For this example, domain size = 3-1 = 2
size of interval = 2/n
height varies from f(1) to f(3), increasing by 2/n each time.
f(1+(2/n)i)

Putting this together, the area is the sum of:
\frac{2}{n}*f(1+\frac{2i}{n})

Since you are given the function f(x). Sub input into f(x) to get area in terms of n and i.

f(1+\frac{2i}{n}) = \frac{3(1+\frac{2i}{n})}{(1+\frac{2i}{n})^2 +8} \\  \\ =\frac{3n+6i}{n}*\frac{n^2}{(n+2i)^2 +8n^2} \\  \\ =\frac{3n^2 +6ni}{9n^2+4ni+4i^2}

Finally, the summation is:
\frac{2}{n}*\frac{3n^2 +6ni}{9n^2+4ni+4i^2} = \frac{6n +12i}{9n^2+4ni+4i^2} \\  \\  A =\lim_{n \to \infty} \sum_{i=1}^n \frac{6n +12i}{9n^2+4ni+4i^2}
7 0
3 years ago
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