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2 years ago

15

Nina babysits on weekends for extra money. The function f(t) is equal to how much money she earns after babysitting t hours. On

Friday night, f(4)=60. How many hours did Nina babysit on Friday night?

2 answers:

Darina [25.2K]2 years ago

6 0

Answer:

4

Step-by-step explanation:

t is replaced by 4 and t = hours

Dmitry_Shevchenko [17]2 years ago

6 0

Answer:4=t

Step-by-step explanation:

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Simplify 4 1/2 x 2 3/5<br> 8 3/7<br> 117/7<br> 8 3/10<br> 11 7/10

Lynna [10]

Answer:

$\frac{27}{5} = 5 \frac{2}{5}$

Step-by-step explanation:

4 1/2 × 2 3/5

9/2 × 2 × 3/5

9 × 3/5

<u>=</u><u> </u><u>2</u><u>7</u><u>/</u><u>5</u><u> </u><u>=</u><u> </u><u>5</u><u> </u><u>2</u><u>/</u><u>5</u>

8 0

2 years ago

LekaFEV [45]

6 bills in the deposit were $10 bills.

<u>Step-by-step explanation:</u>

The total number of bills he gave the teller = 24 bills

x + y = 24 ------------(1)

Let,

x be the number of $5 bills.

y be the number of $10 bills.

The total bank deposit made using $5 and $10 bills are $150.

<u>He deposits $5 bills and $10 bills. So, the equation can be framed as : </u>

5x + 10y = 150 --------(2)

The question is asked for how many $10 bills were in the deposit,

Here 'y' is the number of $10 bills.

<u>To solve for y value : </u>

The eq(1) must be multiplied by 5 and subtract eq(2) from eq(1),

5x + 5y = 120

-(<u>5x + 10y = 150</u>)

<u>-5y = -30 </u>

⇒ y = 30/5

⇒ y = 6

Therefore, there were 6 bills in the deposit that are $10 bills.

3 0

3 years ago

The revenue, in dollars, of a company that makes toy cars can be modeled by the polynomial 3x2 4x – 60. the cost, in dollars, of

Anuta_ua [19.1K]

An expression has numbers, variables, and mathematical operations. The expression that represents the profit made by the organization is 5x-200.

<h3>What is an Expression?</h3>

In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.

As it is given that the profit is the difference between the revenue and cost. Therefore, the expression that represents the profit can be written as,

$\rm Profit = Revenue - Cost$

$= (3x^2+4x-60)-(3x^2-x+200)\\\\= 3x^2+4x-60-3x^2+x-200\\\\=5x-260$

Thus, the expression that represents the profit made by the organization is 5x-200.

Learn more about Expression:

brainly.com/question/13947055

5 0

2 years ago

A gym charges a one-time registration fee as well as a monthly fee. The cost of joining the gym for 4 months is $370, and the co

Anna007 [38]

$x-\ registration\ fee\\
y-\ monthly\ fee\\\\
 \left \{ {{x+4y=370} \atop {x+6y=530\ \ |*(-1)}} \right. \\\\
 \left \{ {{x+4y=370} \atop {-x-6y=-530}} \right. \\+-----\\Addition\\\\
-2y=-160\ \ | divide\ by\ -2\\
y=80\\\\
x=370-4y=370-4*80=370-320=50\\\\
Registration\ fee\ is\ equal\ to\ 50\$\ and\ monthly\ fee\ is\ equal\ to\ 80\$.
$

8 0

3 years ago

Natalie is in the business of manufacturing phones. She pays a cost of $50 per

Trava [24]

Answer:

C = 50p +900

Step-by-step explanation:

Table: (phones, cost) = (0, 900), (1, 950), (2, 1000).

Equation: C = 900 +50p

__

The fixed cost (900) is the "y-intercept" of the equation in slope-intercept form. The cost per phone (50) is the "rate of change" or slope.

5 0

2 years ago