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aleksley [76]
3 years ago
11

amanda spent half of her weekly allowance on whole 30 vegetables. To earn more money she sold an old picture online for $9.70, W

hat is her weekly allowance is she ended up with $15.10? Write an equation and solve
Mathematics
1 answer:
Wewaii [24]3 years ago
3 0

Answer:

$10.80

Step-by-step explanation:

I'm assuming that the $15.10 includes the $9.70 she got from the old picture.

$15.10-$9.70=$5.40

That means half of her weekly allowance is $5.40

If half of her weekly allowance is $5.40, then her entire weekly allowance is $5.40*2 = $10.80

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Find the measurements (the length L and the width W) of an inscribed rectangle under the line with the 1st quadrant of the x &am
Leni [432]

The question is incomplete. Here is the complete question.

Find the measurements (the lenght L and the width W) of an inscribed rectangle under the line y = -\frac{3}{4}x + 3 with the 1st quadrant of the x & y coordinate system such that the area is maximum. Also, find that maximum area. To get full credit, you must draw the picture of the problem and label the length and the width in terms of x and y.

Answer: L = 1; W = 9/4; A = 2.25;

Step-by-step explanation: The rectangle is under a straight line. Area of a rectangle is given by A = L*W. To determine the maximum area:

A = x.y

A = x(-\frac{3}{4}.x + 3)

A = -\frac{3}{4}.x^{2}  + 3x

To maximize, we have to differentiate the equation:

\frac{dA}{dx} = \frac{d}{dx}(-\frac{3}{4}.x^{2}  + 3x)

\frac{dA}{dx} = -3x + 3

The critical point is:

\frac{dA}{dx} = 0

-3x + 3 = 0

x = 1

Substituing:

y = -\frac{3}{4}x + 3

y = -\frac{3}{4}.1 + 3

y = 9/4

So, the measurements are x = L = 1 and y = W = 9/4

The maximum area is:

A = 1 . 9/4

A = 9/4

A = 2.25

6 0
3 years ago
What is the absolute value of -8? Use the number line to help answer the question
Ad libitum [116K]
The absolute value of -8 is 8
here’s a trick the absolute value of a positive is the same number of its negative it’s the same number but positive
hope it helps
4 0
3 years ago
Please solve! (20 points)<br><br> 3(14m + m)
IgorC [24]

Answer:

43m

Step-by-step explanation:

3(14m+m)

42m+3m

45m

7 0
3 years ago
Read 2 more answers
-2x - 6y = -24<br> X-8y = -10
Debora [2.8K]

Answer:

x = -26 and y = -2

I hope this is the answer you are looking for

Step-by-step explanation:

x-8y = -10 => add 8y to both sides

+8y = +8y

x = -10+8y

-2(-10+8y) -6y = -24 => intersect what you got into the first equation

20-16y-6y = -24 => Distribute the -2

20-22y     = -24 => subtract 20 in both sides

-20           = -20

-22y = -44 => divided by -22 in both sides

/-22 = /-22

y = -2

x-8(-2) =-10 => intersect the y into the other equation

x+16 = -10 => multiply -8*-2

 -16  = -16

x = -26 => subtract 16 in both sides.

8 0
3 years ago
1 dollar = 1.2 euros
MArishka [77]

85 yen are equivalent to 1 euro ⇒ answer O

Step-by-step explanation:

The given is:

  • 1 dollar = 1.2 euros
  • 1 dollar = 102 yen

We need to find how many yens are equivalent to 1 euro

∵ 1 dollar = 1.2 euros

∵ 1 dollar = 102 yen

- Equate the two right sides of 1 dollar

∴ 1.2 euros = 102 yen

- To find 1 euro equals how many yen divide both sides by 1.2

∵ (1.2 ÷ 1.2) euros = (102 ÷ 1.2) yen

∴ 1 euro = 85 yen

85 yen are equivalent to 1 euro

Learn more:

You can learn more about the word problems in brainly.com/question/2119883

#LearnwithBrainly

4 0
3 years ago
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