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2 years ago

Marya is in charge of keeping track of the funds of 84 youngsters attending a camp.

Mathematics

2 answers:

9966 [12]2 years ago

5 0

63 people ordered ice cream so the total is 141.75

0.75(84)x2.25=total

kodGreya [7K]2 years ago

3 0

63 people ordered ice cream so the total is
141.75
0.75(84)x2.25=total

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The sum of two numbers is 225. The difference of the same two numbers is 35.What are the 2 numbers?

Ksivusya [100]

Answer:

130 and 95

Step-by-step explanation:

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3 years ago

If a toaster oven that is connected to a 120 v plug has 16 A of current running through it, what is the resistance?

Alenkinab [10]

Answer:

The resistance is 7.5 ohms

Step-by-step explanation:

V = IR

V = voltage I is the current and R = resistance

120 = 16*R

Divide by 16 on both sides

120/16 = 16R/16

7.5 = R

The resistance is 7.5 ohms

4 0

3 years ago

Read 2 more answers

A parabola can be drawn given a focus of

Volgvan

Answer:

$y=-\frac{1}{4}(x-2)^{2}+9$

Step-by-step explanation:

Any point on a given parabola is equidistant from focus and directrix.

Given:

Focus of the parabola is at $(2,8)$ .

Directrix of the parabola is $y=10$ .

Let $(x,y)$ be any point on the parabola. Then, from the definition of a parabola,

Distance of $(x,y)$ from focus = Distance of $(x,y)$ from directrix.

Therefore,

$\sqrt{(x-2)^{2}+(y-8)^{2}}=|y-10|$

Squaring both sides, we get

$(x-2)^{2}+(y-8)^{2}=(y-10)^{2}\\(x-2)^{2}=(y-10)^{2}-(y-8)^{2}\\(x-2)^{2}=(y-10+y-8)(y-10-(y-8))...............[\because a^{2}-b^{2}=(a+b)(a-b)]\\(x-2)^{2}=(2y-18)(y-10-y+8)\\(x-2)^{2}=2(y-9)(-2)\\(x-2)^{2}=-4(y-9)\\y-9=-\frac{1}{4}(x-2)^{2}\\y=-\frac{1}{4}(x-2)^{2}+9$

Hence, the equation of the parabola is $y=-\frac{1}{4}(x-2)^{2}+9$ .

4 0

3 years ago

Work out the percentage change to 2 decimal places when a price of £57.99 is decreased to £49.99.

IRISSAK [1]

Answer:

Percentage change in price = 13.80%

Step-by-step explanation:

Given that:

Original price = £57.99

Decreased price = £49.99

Difference = Original price - Decreased price

Difference = 57.99 - 49.99

Difference = £8.00

Percent change = $\frac{Difference}{Original\ price}100$

Percent change = $\frac{8.00}{57.99}*100$

Percent change in price = 13.80%

Hence,

Percentage change = 13.80%

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3 years ago

If the side ratio is 9:12, then the volume ratio is

Reika [66]

I think it’s D because the ratio

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2 years ago