All categories

3 years ago

Marco went to the cafeteria to buy chicken sandwiches, C, worth $2.00, and hamburgers, h, worth $2.50.

Mathematics

2 answers:

yaroslaw [1]3 years ago

6 0

Answer:

5 Hamburgers = $12.50 4 Chicken sandwiches $8.00( $12.50 + $8.00 = $20.50

Step-by-step explanation:

soldi70 [24.7K]3 years ago

5 0

Answer:

Marco bought 5 hamburgers and 4 chicken sandwiches.

Step-by-step explanation:

Set up a system of equations:

2c + 2.5h = 20.5

c + h = 9

Solve by elimination by multiplying the bottom equation by -2:

2c + 2.5h = 20.5

-2c - 2h = -18

Add the equations together and solve for h:

0.5h = 2.5

h = 5

So, he bought 5 hamburgers. Plug in 5 as h into the second equation to solve for c:

c + h = 9

c + 5 = 9

c = 4

So, Marco bought 5 hamburgers and 4 chicken sandwiches.

You might be interested in

X/-9 ≥ 3

____ [38]

Answer:

x ≤ -27

Hope this helps,

Davinia.

8 0

3 years ago

Read 2 more answers

A beach ball had a diameter of 10 inches what is the volume of air contained inside the beach ball use 3.14

TiliK225 [7]

Answer:

10 in=

3.14=

1,570 is the LCD

Step-by-step explanation:

1. The value of a variable that makes an equation true.

2. In chemistry, a solution is a homogeneous mixture composed of only one phase.

Find the least common multiple (LCM) of the denominators in order to find the least common denominator (LCD).

7 0

3 years ago

PTG has side lengths of 18cm, 14cm, and 16cm which type of triangle is PTG

mihalych1998 [28]

I want to say it is an acute angel

8 0

3 years ago

Read 2 more answers

The price of a watch was increased by 10% to £132. What was the price before the increase?

AnnZ [28]

Answer:120

Step-by-step explanation:

132/11= 12

it means each 10 percent is = to 12

12*10 = 120

5 0

3 years ago

Read 2 more answers

Find f'(x) and state the domain of f': f(x) = In (2x^2+1)

-Dominant- [34]

Answer:

$f'(x) = \frac{4x}{2x^2+1}$

Domain: All Real Numbers

General Formulas and Concepts:

Algebra I

Domain is the set of x-values that can be inputted into function f(x)

Calculus

The derivative of a constant is equal to 0

Basic Power Rule:

f(x) = cxⁿ
f’(x) = c·nxⁿ⁻¹

Chain Rule: $\frac{d}{dx}[f(g(x))] =f'(g(x)) \cdot g'(x)$

Derivative: $\frac{d}{dx} [ln(u)] = \frac{u'}{u}$

Step-by-step explanation:

Step 1: Define

f(x) = ln(2x² + 1)

Step 2: Differentiate

Derivative ln(u) [Chain Rule/Basic Power]: $f'(x) = \frac{1}{2x^2+1} \cdot 2 \cdot 2x^{2-1}$
Simplify: $f'(x) = \frac{1}{2x^2+1} \cdot 4x$
Multiply: $f'(x) = \frac{4x}{2x^2+1}$

Step 3: Domain

We know that we would have issues in the denominator when we have a rational expression. However, we can see that the denominator would never equal 0.

Therefore, our domain would be all real numbers.

We can also graph the differential function to analyze the domain.

5 0

3 years ago