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Marina CMI [18]
3 years ago
5

The graph begins at 620 on the y-axis.what does this value represent?is this the rate of change or the initial value

Mathematics
1 answer:
Lilit [14]3 years ago
5 0

Answer:

Step-by-step explanation:

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A jeweler needs 50 ounces of a 21% silver alloy. Find the amount of a 12% silver alloy and the amount of a 24% silver alloy he s
sergij07 [2.7K]

Answer:

  • 12.5 ounces of 12% alloy
  • 37.5 ounces of 24% alloy

Step-by-step explanation:

Let x represent the amount (in ounces) of 24% alloy in the mix. Then the amount of 12% alloy is (50 -x). The amount of silver in the mix is ...

  24%·x + 12%·(50 -x) = 21%·50

  12x = 450 . . . . . . simplify, multiply by 100 (to eliminate %), and subtract 600

  x = 37.5 . . . . . . . divide by 12

The jeweler needs to mix 37.5 ounces of 24% silver alloy with 12.5 ounces of 12% silver alloy to make 50 ounces of 21% silver alloy.

4 0
3 years ago
Use order of operations to evaluate the expression below. 11 x 9 + [ 15 - 9 ]
valentinak56 [21]

Answer:

105

Step-by-step explanation:

11 x 9 + [15 - 9]

First is brackets

= 11 x 9 + 6

then multiplication

= 99 + 6

then addition

= 105

6 0
3 years ago
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Solve the following problem: a Chevrolet Impala travels 26 mpg in the city. How far will the Chevrolet Impala travel on 14.6 gal
Arisa [49]

Step-by-step explanation:

26 * 14.6= 379.6 miles

3 0
3 years ago
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Acellus help slope intercept
Serjik [45]

Greetings.

The answer is y = 2x + 7.

Explanation:

If you are an expert in graph then you are able to find the slope without calculating. (Rise over Run by looking at the graph.)

We can also find the slope by calculating m-value.

m=\frac{y_2-y_1}{x_2-x_1}   ---> Rise Over Run

<em>But how are we gonna calculate if we don't have any two given ordered pairs?</em>

The answer is, we can just pick two ordered pairs that are part of the graph, or rather say that the graph passes through.

The graph passes through (-3,1) and (-2,3).

Then we can calculate the slope by using rise/run.

m=\frac{3-1}{-2-(-3)}\\m=\frac{2}{-2+3}\\m=\frac{2}{1}\\m=2

Thus, the slope is m = 2.

However, we are not done yet. We just only found out the slope. We need to find the y-intercept too.

From Linear Function - y=mx+b

Where m = slope and b = y-intercept.

Since b = y-intercept, we don't need to calculate/substitute x = 0. We simply find which number the graph has y-intercept at.

Which is (0,7), the y-intercept.

Then we substitute b = 7 as y-intercept.

Thus the answer is y=2x+7

3 0
3 years ago
And simplify this too ​
Andrew [12]

Answer:

-5x^4

Step-by-step explanation:

Cube root of -125 is -5

Cube root of n^12 is n^4

6 0
3 years ago
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