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kotegsom [21]
3 years ago
11

Brainliest for best answer

Mathematics
1 answer:
pickupchik [31]3 years ago
7 0

Answer:

1. 120, 2. 6, 3. 21

Step-by-step explanation:

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Alima is solving a question, where a given number has to be multiplied by 15. Alima did not read the question carefully, and mul
loris [4]

x    -  Alma's given number

15•x  -  the number multiplied by 15 (the correct answer)

5•x   - the number multiplied by Alma (Alma's answer)

her answer is 150 less than the correct answer:

5•x = 15•x - 150

15x - 150 = 5x

15x - 5x = 150

 10x = 150

   <u>x = 15</u>

3 0
2 years ago
April sold 75 tickets to the school Christmas play and collected $495. If adult tickets cost $8 and children tickets were $5 how
Ostrovityanka [42]

40 adult tickets were sold and 35 children tickets were sold

<em><u>Solution:</u></em>

Let "a" be the number of adult tickets sold

Let "c" be the number of children tickets sold

Cost of 1 adult ticket = $ 8

Cost of 1 children ticket = $ 5

<em><u>Given that April sold 75 tickets to the school Christmas play and collected $495</u></em>

Number of tickets sold = 75

number of adult tickets sold + number of children tickets sold = 75

a + c = 75 ----- eqn 1

<em><u>Given that April collected $495</u></em>

Thus we can frame a equation as:

number of adult tickets sold x Cost of 1 adult ticket + number of children tickets sold x Cost of 1 children ticket = $ 495

a \times 8 + c \times 5 = 495

8a + 5c = 495 ----- eqn 2

<em><u>Let us solve eqn 1 and eqn 2 to find values of "a" and "c"</u></em>

From eqn 1,

a = 75 - c ---- eqn 3

Substitute eqn 3 in eqn 2

8(75 - c) + 5c = 495

600 - 8c + 5c = 495

-3c = 495 - 600

-3c = - 105

<h3>c = 35</h3>

Substitute c = 35 in eqn 3

a = 75 - 35

<h3>a = 40</h3>

Thus 40 adult tickets were sold and 35 children tickets were sold

8 0
3 years ago
What is the equation of the following line written in slope-intercept form? Oy=-3/2x-9/2
Sladkaya [172]

Answer:

the answer is C

Step-by-step explanation:

i got da best $80 calculator

6 0
2 years ago
9. A company’s marginal cost function is where x is the number of units. Find the total cost of producing units 144 to 625.
Anettt [7]

Answer:

total cost is $2444

Step-by-step explanation:

A company’s marginal cost function MC= \frac{94}{\sqrt{x} } is where x is the number of units

Marginal cost function is the derivative of cost function

to find the total cost of producing units , take integral of marginal cost function

\int\limits ^{625}_{144}{\frac{94}{\sqrt{x} } } \, dx

94(2\sqrt{x} ) with intervals 144 to 625

now plug in the values

94(2\sqrt{625})-94(2\sqrt{144})=2444

total cost is $2444

5 0
3 years ago
Put the following into vertex form: y=-2x^2+4x+6
Ymorist [56]
This is how your answer would look like in vertex form:
y= -2 (x - 1)^2 + 8
4 0
2 years ago
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