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meriva
3 years ago
11

A+7.7= -7.1 Explain Hint: Equations and rational coefficient.

Mathematics
2 answers:
antiseptic1488 [7]3 years ago
7 0

Answer:

-14.8

Step-by-step explanation:

if you do add -14.8 to 7.7 your answer will be negative because if you see -14.8 has a higer absolute value.( keep the sign with the higher absolute value). Then when you add you will and get -7.1

il63 [147K]3 years ago
6 0

a+7.7=-7.1

-7.7 -7.1

_____________

a=-14.8

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The perimeter of a rectangular baking sheet is 58 inches and its area is 201.25 in.2. What are the length and width of the bakin
anzhelika [568]

Answer:

Length=17.5\ in\\\\Width=11.5\ in

Step-by-step explanation:

The formula for calculate the Area of a rectangle is:

A=lw

Where "l" is the lenght and "w" is the width.

And the formula for calculate the peimeter of a rectangle is:

P=2l+2w

Where "l" is the lenght and "w" is the width.

We know that the perimeter of the rectangular baking sheet is 58 inches and its area is 201.25 in². Then:

A=201.25\ in^2\\\\P=58\ in

<u>The steps are:</u>

1. Solve for the "l" from the formula A=lw:

A=lw\\\\l=\frac{A}{w}\\\\\l=\frac{201.25}{w}

2. Substitute l=\frac{201.25}{w} into the formula P=2l+2w and solve for "w":

58=2(\frac{201.25}{w})+2w\\\\58=\frac{402.5}{w}+2w\\\\58=\frac{402.5+2w^2}{w}\\\\58w=402.5+2w^2\\\\2w^2-58w+402.5=0

Applying the Quadratic formula x=\frac{-b\±\sqrt{b^2-4ac}}{2a}, we get:

x=w=\frac{-(-58)\±\sqrt{(-58)^2-4(2)(402.5)}}{2(2)}\\\\w_1=17.5\\\\w_2=11.5

3.  Substitute w_1=17.5 into l=\frac{201.25}{w}:

l=\frac{201.25}{17.5}=11.5

4. Substitute w_2=11.5 into l=\frac{201.25}{w}:

l=\frac{201.25}{11.5}=17.5

Therefore, since the value of the lenght of a rectangle must be greater that the value of the width, we can conclude that the lenght and the width of the rectangular baking sheet are:

l=17.5\ in\\\\w=11.5\ in

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3 years ago
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What is the y-intercept of the graph of the line given by the equation 3y + 4x = 15
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Answer:

It would be 5

Step-by-step explanation:

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2 years ago
A container holds 4 quarts of lemonade. How much is this in cups?
Fantom [35]
1 quart = 4 cups.  So 4 x 4 will give you your answer, which is 16 cups.
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3 years ago
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480√3

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