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Wittaler [7]
3 years ago
12

This relation is a function: {(5,-2), (6,-2),(7,-2), (8,-2)} A.True B.False

Mathematics
1 answer:
AlladinOne [14]3 years ago
8 0

Answer:

true

Step-by-step explanation:

each x-value have exactly only one y-value

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I'll give brainliest to whoever answers first and is correct!!
Nina [5.8K]

Answer:

(a) y=8x+5

(b) 7 hours.

Step-by-step explanation:

(a) Let x be the number of hours and y is the total cost.

We have been given that Beatrice and her friends charge $8 per hour of babysitting, so the charges for x hours of babysitting will be 8x.

As they also charge a mandatory $5 per day fee for each child for snacks, so the total charges for babysit each day will be charges for x hours of babysitting plus mandatory charge.

We can represent this information in an equation as:

y=8x+5

Therefore, the equation y=8x+5 represents the total cost of using Beatrice’s babysitting service each day.

(b) To find the number of hours Beatrice babysit the daughter, we will substitute y = 61 in our equation and solve for x.

61=8x+5

Let us subtract 5 from both sides of our equation.

61-5=8x+5-5

56=8x

Let us divide both sides of our equation by 8.

\frac{56}{8}=\frac{8x}{8}

7=x

Therefore, Beatrice babysit 7 hours the daughter.

Expression for part c is missing.

6 0
3 years ago
A baseball has a 45 cm diameter. what is the volume of the contents of the ball
Morgarella [4.7K]
First you need to find the radius. To do that you need to divide the diameter by two;

45 / 2 = 22.5

Then you plug the radius in the formula for a sphere. Which is...

V = (4 / 3)πr^3
First you need to find the volume with out pi

V = (4/3) π (45)^3
V= π (4/3) (91,125)
Your answer with out pi is...
V= (68,343.75) π cm^3
And with pi is...
V = 214,708.22 cm^3
5 0
3 years ago
Read 2 more answers
.<br> + 1687 – 1575 - 287 = 4808
Inessa [10]

Answer:

 google

Step-by-step explain

Google is key

4 0
3 years ago
Read 2 more answers
mindy is 3 years older than two times her brother jake’s age. let j represent jake’s age and m represent mindy's age. which equa
horrorfan [7]
Okay so, it would be

<span>2*j+3 = m
( jake's age times 2 in order to represent being 2 years older, however... Mindy is 3 more years old than the product of that expression. This would add 3.) 
</span>
So, C? m = 2j + 3
7 0
2 years ago
Read 2 more answers
Find the linear approximation of the function f(x, y, z) =
ser-zykov [4K]

Answer:

See below in bold.

Step-by-step explanation:

f(x, y, z) = x^2 + y^2 + z^2 at (6, 6, 7)

Taking partial derivatives

f'x = 2x + y^2 + z^2 --> f'x(6,6,7) =  12+36+49= 97

f'y = x^2 + 2y + z^2---> f'y(6,6,7) = 36 + 12 + 49 = 97

f'z = x^2 + y^2 + 2z ----> f'z(6,6,7) =  36 + 36 + 14 = 86.

f(6,6,7) =  36 + 36 + 49 = 121

So our linear approximation is:

L(x,y,z) = 121 + 97(x - 6) + 97(y - 6) + 86(z - 7)

Substituting the given values

f(6.012, 5.972,6.982)

= L(6.012, 5.972, 6.982) ≈ 121 + 97(6.012 - 6) + 97(5.972 - 6) + 86(6.982 - 7)

= 117.9.

3 0
2 years ago
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