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2 years ago

If a silver alloy that costs $4.50 an ounce is

Mathematics

2 answers:

Norma-Jean [14]2 years ago

7 0

Answer:

4 ounces

10 ounces of $8 + 4 ounces of $4.5 =$98 ÷ by 14 = $7

Nitella [24]2 years ago

5 0

6.5X + 9(30) = 8(30+X)6.5X +270 = 240 + 8X270-240 = 8X-6.5X1.5X = 30X = 30/1.5 =20 ounces of $6.50 alloy9 is within 1 of 86.5 is within 1.5 of 81.5 is 3/2 of 130 is 3/2 of 20You know you need more of $9 alloy since it's closer to $8You need exactly 3/2 or 1.5 times more of the $9 alloy30 is 1.5 times 20

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How do you factor x²-100 ?

Strike441 [17]

Answer:

(x+10)(x-10)

Step-by-step explanation:

both numbers can be squared so you have to take out the square and since 100 is negative one must be positive and one must be negative

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3 years ago

how do you find the missing length of a triangle given 2 angles and 1 side length? (looks like this)

zavuch27 [327]

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3 years ago

If aₙ = 3(3)ⁿ⁻¹ , what is S₃? 12 27 9 39

Allushta [10]

Answer:

$S_3=39$

Step-by-step explanation:

The nth term of the sequence is

$a_n=3(3)^{n-1}$

To get the first term, substitute n=1,

$a_1=3(3)^{1-1}=3$

To get the second term, substitute n=2,

$a_2=3(3)^{2-1}=9$

To get the third term, substitute n=3,

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The sum of the first three terms is

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We could also use the formula

$S_n=\frac{a_1(r^n-1)}{r-1}$ to get the same result.

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3 years ago

Read 2 more answers

Ellie practices piano 2/3 h per day, several days each week. She practiced piano 32 2/3 hours during the summer.

Wewaii [24]

Answer:

2/3 *d = 32 2/3

Step-by-step explanation:

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3 years ago

A company that prints Blue Books for exams makes a profit according to the number of books sold. Suppose that the Profit is

Ne4ueva [31]

Answer:

The answer is not complete. I will explain the concept of profit to you.

Step-by-step explanation:

We can determine profit deducting direct costs (cost price) of commodities from sales (selling prices) of the commodities.

Profit = Selling Price - Cost Price

Example:

A trader buys some dresses for #2,500 in May and agrees to pay for it in three months’ time. He sells off all the dresses in August for #4,500. The profit for the month is #2,000.

The formula for percentage profit is $\frac{profit * 100}{cost price}$

The formula for gross profit is Revenue – Cost of Sold Items

Profit Margin = $\frac{Total Income}{Net Sales}$ * 100

While Gross Profit Margin can be calculated as $\frac{Gross Profit}{Net Sales}$ * 100

Any of these formulas can be used to calculate profit-related questions.

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3 years ago