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3 years ago

11

Mr. Green needs to give each student in his class $0.75 for bus fare for a field trip, but he's not sure if he has enough quarte

rs. With $13.75 in quarters, he will be able to give bus
fare to how many students?

1 answer:

EleoNora [17]3 years ago

5 0

Answer: He has enough quarters to give 18 students bus fare.

Step-by-step explanation:

1 quarter = 0.25

3 quarters = 0.75

0.75 * x = 13.75

/0.75

x = 18.33

18 * 0.75 = 13.50

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The sum of two numbers is 80. Their difference is 22.

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51 + 29

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2 years ago

The cone and the cylinder below have equal surface area. True or false.

WARRIOR [948]

Answer:

False

Step-by-step explanation:

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$SA=\pi r^2 +\pi\times r\times 2r$

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3 years ago

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Margarita [4]

number 7 is as follows Answer: C18.9

Step-by-step explanation:

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5 0

3 years ago

Read 2 more answers

The length of a rectangle is 6 more than twice the width. if the area is 40 cm^2, find the length and breadth of the rectangle

ra1l [238]

Answer: 3.217 & 12.434

Step-by-step explanation:

If we use <em>w</em> to represent the width, the length will be 6 more than 2 times w.

Hence, the length is $2w+6$ .

The area of a rectangle would be its length times its width, so let's make an equation to represent it's area.

$A=w(2w+6)$

We can also substitute 40 in for A as it's given in the question.

$40 = w(2w+6)$

Distributing <em>w</em> by multiplying it by both terms in the parentheses, we get

$40 = 2w^2+6w$

We can make the equation simpler by dividing both sides by 2.

$20 = w^2+3w$

Subtracting both sides by 20 will make the left-hand side 0.

$0=w^2+3w-20$

Now that we have put this <em>quadratic equation</em> into standard form (ax²+bx+c), we can find its solutions using the quadratic formula.

For reference, the quadratic formula is

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

In this case, a is 1, b is 3, and c is -20.

Substituting, we get

$w=\frac{-3\pm\sqrt{3^2-4(1)(-20)}}{2(1)}$

$w= \frac{-3\pm\sqrt{9+80}}{2}$

$w=\frac{-3+\sqrt{89}}{2}\hspace{0.1cm}or\hspace{0.1cm}\frac{-3-\sqrt{89}}{2}$

Since the second solution results in a negative number, it cannot be the length of w.

$w=\frac{-3+\sqrt{89}}{2}\approx3.217$

The width/breadth of the rectangle is 3.217 cm.

To calculate the length, let's substitute the width into the expression for the length:

$l=2(3.217)+6$

$l=12.434$

The length of this rectangle is 12.434 cm.

6 0

1 year ago

The formula for area is length x width.

ollegr [7]

Answer:

7/8

Step-by-step explanation:

7/5•5/8= 7•5/5•8

= 35/40

=7/8

hope this helps chu

8 0

2 years ago