Ask question

Ask question

All categories

Misha Larkins [42]

3 years ago

15

Rita owed her brother $15. After her birthday, she was able to pay him back and still have $45. How much money did Rita receive

for her birthday?

1 answer:

kipiarov [429]3 years ago

6 0

I’m stuck in the same one!!

Step-by-step explanation:

You might be interested in

An artist used silver wire to make a square that has a perimeter of 40 inches. She then used copper wire to make the largest cir

finlep [7]

Answer:

The area of the copper circle is <u>31.4 inches</u>.

Step-by-step explanation:

Given:

An artist used silver wire to make a square that has a perimeter of 40 inches.

She then used copper wire to make the largest circle that could fit in the square, with perimeter of 40 inches.

Use 3.14 to represent π.

Now, to find the area of the copper circle.

Perimeter of square = 40 inches.

So, we get the side of square by putting formula:

$Perimeter=4\times side$

$40=4\times side$

Dividing both sides by 4 we get:

$10=side.$

$Side=10\ inches.$

Now, as the side of square is 10 inches it is the diameter of the circle as the square is fit inside the circle:

For getting the area of circle we find the radius:

Radius (r) = $\frac{Diameter}{2} \\=\frac{10}{2}= 5\ inches.$

Now, putting the formula to get the area of the circle:

$Area=2\times \pi \times r$

$Area=2\times 3.14\times 5$

$Area=31.4\ inches.$

Therefore, the area of the copper circle is 31.4 inches.

6 0

3 years ago

On Sunday, a local hamburger shop sold a combined of 572 hamburger and cheeseburger. The number of cheeseburgers sold was three

igor_vitrenko [27]

Answer: 143 hamburgers and 429 cheese burgers

Explanation:

Call h and c the number of both items.
(h-hamburger and c-cheeseburger)

h + c = 572
c = 3h

Sub the second into the first

h + 3h = 572
4h = 572

Divide both sides by 4
h = 143 hamburgers

Use this back into the second equation
c = 3 • 143 = 429 cheeseburgers

3 0

3 years ago

6. Gabriella invests $6,500 into a savings account that earns 4.5% interest, and she is investing the money for 5 years without

sdas [7]

Answer:

1,462.50

Step-by-step explanation:

6500

x.045

=292.50 per year

x. 5 years

=1,462.50

4 0

3 years ago

Find the area in the right tail more extreme than z= 3.01 in a standard normal distribution

Feliz [49]

<span>The area in the right tail more extreme than z= 3.01 in a standard normal distribution is given by

P(z > 3.01) = 1 - P(z < 3.01) = 1 - 0.99869 = 0.00131
</span>

5 0

3 years ago

If my phone bill is calculated using equation c= 50g +75 what is the value and interpretation of the slope of this equation? C=

olga nikolaevna [1]

Answer:

The value of the slope in this equation is 50

The interpretation is that the rate of change in the cost of the phone bill per unit change in gigabytes of data used each month is 50

Step-by-step explanation:

To answer this question, we need to compare the given equation with the equation of a straight line graph.

The equation we have is;

c = 50g + 75

comparing this with the equation of a straight line, we have

y = mx + c

where m represents the slope and c is the y-intercept

So comparing both, the slope of the equation is 50.

The slope is always the co-efficient of the value on the x-axis

So what does this mean?

The slope also called the gradient represents the rate of change of the y-term divided by the rate of change of the x-term. In simpler terms, when we talk of the slope, we mean the rate of change of the y term per the unit change of the x-term.

So what we mean in this case is the rate of change in cost of the phone bill per unit change in gigabytes of data used each month is 50

3 0

3 years ago