Answer:
15 marks
Step-by-step explanation:
If the average mark obtained by 3 students is 15, then the total marks are
⇒ 3 x 15 = 45
Let x be the marks obtained by the third student.
If two students obtained 12 and 18 marks, then
⇒ 12 + 18 + x = 45
⇒ 30 + x = 45
⇒ x = 45 - 30
⇒ x = 15
Answer:
x + y ≥ 4
8x + 10y ≤ 70
Step-by-step explanation:
1. State the variables
According to the graph, "Number of green towels" is on the x-axis, and "Number of blue towels" is on the y-axis, so:
let x be the number of green towels.
let y be the number of blue towels
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2. <u>Write an equation for the total number of towels</u>.
The sum of number of green towels and the number of blue towels is the total number of towels.
x + y ≥ 4
"She wants to buy at least 4 towels" means she needs 4 or more. Use the ≥ symbol instead of > (which would mean more than 4 towels, not only 4).
3. <u>Write an equation for the money</u> she will spend.
Multiply each variable by the cost of the towel colour. Add them together. Equate the total as 70 because she is only willing to spend 70.
8x + 10y ≤ 70
"She does not want to spend more than $70" means she is willing to spend 70, but no more. This is why we use ≤ and not < (which would mean she would not spend 70, only less than 70).
The equations are x + y ≥ 4 and 8x + 10y ≤ 70.
Answer:
La respuesta es la C
Step-by-step explanation:
Primero tienes que hacer el 25% de ambas cantidades y luego sumarlo
Workers pay an average of 6.2 percent which is 127,000 a year. But <span>employers pay a matching amount for a combined contribution of 12.4 percent of earnings.
Meaning you are either getting 6.2 percent for being a WORKER.
or getting 12.4 percent for being a EMPLOYER.
In this question you are looking for employer so the answer is 12.4
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Step-by-step explanation:
That's it bro hope it helps you