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Hunter-Best [27]
3 years ago
6

7 + (2+ 3) equivalent to (7 + 2) + 3

Mathematics
1 answer:
IRISSAK [1]3 years ago
4 0

Answer: Yes

Step-by-step explanation:

7+(5)=12

(9)+3=12

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Jimmy owns a small engine repair business. The revenue, in dollars, can be modeled by the equation y = 420 + 72x, where x is the
kozerog [31]

Answer:

5 hours

Step-by-step explanation:

Given

y = 420 + 72x --- Revenue

y = 24x^2 + 180 --- Overhead cost

Required

Determine the hours for break even

To do this, we simply equate both expressions as follows:

24x^2 + 180 = 420 + 72x

Collect Like Terms

24x^2 - 72x + 180 - 420 = 0

24x^2 - 72x -240 = 0

Divide through 24

x^2 - 3x - 10 = 0

Expand:

x^2 -5x + 2x -10 = 0

Factorize:

x(x -5) + 2(x -5) = 0

(x + 2)(x -5) = 0

x + 2 = 0\ or\ x - 5 = 0

x = -2\ or\ x = 5

But x can't be negative because it represents time.

<em>So, x = 5 hours</em>

3 0
3 years ago
Allison’s cupcake and cookie budget for her party is $105. She would like to have at least 40 cupcakes and cookies combined, and
FinnZ [79.3K]

Answer:

a + b ≥ 40

a + 5 ≤ b

2.50a + 1.50b ≤ 105

Step-by-step explanation:

We are told she would like to have at least 40 cupcakes and cookies combined.

If a is number of cupcakes and b is number of cookies, then this inequality is;

a + b ≥ 40

Secondly, we are told she would like to have at most 5 more cupcakes than cookies.

Thus, the inequality is;

a + 5 ≤ b

Lastly, we are told that cupcakes sell for $2.50 and cookies for $1.50

Thus, the inequality is;

2.50a + 1.50b ≤ 105

Finally, the 3 inequalities are;

a + b ≥ 40

a + 5 ≤ b

2.50a + 1.50b ≤ 105

4 0
3 years ago
Do You Understand?
Trava [24]

Answer:

An equation is basically a way to show a relationship of variables (x,y,a,b, etc) and numbers.

Step-by-step explanation:

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faltersainse [42]

Answer:

ok?

Step-by-step explanation:

Sure friend what do you need help with? I will help you

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