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3 years ago

11

Rob is saving to buy a new MP3 player. For every $13 he earns babysitting, he saves $8. On Saturday, Rob earned $65 babysitting.

How much money did he save?

1 answer:

Vedmedyk [2.9K]3 years ago

6 0

Answer:

60

Step-by-step explanation:

So you first start off with 13 and 8 you subtract it and get five so he uses 5 every time he gets paid and you subtract 5 from 65 and get 60

--Hope this helps

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AfilCa [17]

Answer:

b = 115.4 feet

Step-by-step explanation:

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b^2 = 230^2 + 360^2 - 2(230)(360) x cos(38 degrees)

b^2 = 52,900 + 129,600 - 2(230)(360) x cos(38 degrees)

b^2 = 182,500 - 165,600 x cos(38 degrees)

b = $\sqrt{(16,900)(cos(38)) }$

b = 115.4 feet

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2 years ago

Ashley found 78 rocks on Monday. on Tuesdays Devin found 45 rocks how many did the find both days

scoundrel [369]

Lets look at the info we have:-

Ashley found 78 rocks on Monday.
Devin found 45 rocks on Tuesday.

Question:-

How many did they find both days?

The key word for this is "both". So we need to add here. Lets add:-

78 + 45 = 123

So, Ashley and Devin together found 123 rocks.

Hope I helped ya!! xD

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3 years ago

In which quadrant is the point (5,-2) located?

nevsk [136]

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3 years ago

Look at points C and D on the graph:

anyanavicka [17]

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3 years ago

Read 2 more answers

Keegan is printing and selling his original design on t-shirts. He has concluded that for x shirts, in thousands sold his total

Katarina [22]

Answer:

t-shirts: 2790

profit: $12209

Step-by-step explanation:

Given the function:

p(x) = -x³ + 4x² + x

we want to maximize it.

The following criteria must be satisfied at the maximum:

dp/dx = 0

d²p/dx² < 0

dp/dx = -3x² + 8x + 1 = 0

Using quadratic formula:

$x = \frac{-b \pm \sqrt{b^2 -4(a)(c)}}{2(a)}$

$x = \frac{-8 \pm \sqrt{8^2 -4(-3)(1)}}{2(-3)}$

$x = \frac{-8 \pm 8.72}{-6}$

$x_1 = \frac{-8 + 8.72}{-6}$

$x_1 = -0.12$

$x_2 = \frac{-8 - 8.72}{-6}$

$x_2 = 2.79$

d²p/dx² = -6x + 8

d²p/dx² at x = -0.12: -6(-0.12) + 8 = 8.72 > 0

d²p/dx² at x = 2.79: -6(2.79) + 8 = -8.74 < 0

Then, he should prints 2.79 thousands, that is, 2790 t-shirts to make maximum profits.

Replacing into profit equation:

p(x) = -(2.79)³ + 4(2.79)² + 2.79 = 12.209

that is, $12209

3 0

3 years ago