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Scorpion4ik [409]
3 years ago
11

3k - 2c + 8 use k = 7 and c = 4

Mathematics
2 answers:
jolli1 [7]3 years ago
8 0

Answer:

21

Step-by-step explanation:

3k - 2c + 8

k = 7 and c = 4

Substitute the values of k and c in the algebraic expression

3(7) - 2(4) + 8 = 21 - 8 + 8 = 21

Inga [223]3 years ago
6 0

Answer:

21

Step-by-step explanation:

3 (7) - 2(4) + 8

21 - 8 + 8

13 + 8

21

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Perpendicular to the line 2x-5y=-11; passes through (7,5)
Westkost [7]

Answer:

y=-\frac{5}{2}x+\frac{45}{2}

Step-by-step explanation:

The slope intercept form of a line is given as:

y = mx + c

Where m is the slope and c is the y-intercept

Let's rearrange the equation given in this form:

2x - 5y = -11

5y = 2x + 11

y = 2/5 x + 11/5

So the slope is 2/5

Slope of line that is perpendicular to this is the "negative reciprocal" of this slope. Which means the slope of perpendicular line would be  -5/2

Thus, equation would become:  y = -5/2x + c

Now we need to find c. For this we plug in 7 into x and 5 into y and solve for c [(7,5) is the point given]. Thus,

y=-\frac{5}{2}x+c\\5=-\frac{5}{2}(7)+c\\5=-\frac{35}{2}+c\\c=5+\frac{35}{2}\\c=\frac{45}{2}

Thus, the equation of perpendicular line is:

y=-\frac{5}{2}x+\frac{45}{2}

8 0
4 years ago
Complete the equation <br> 9/4= ? ÷ by 4
Stells [14]

Answer:

9

Step-by-step explanation:

9/4 can be said as "9 divided by 4", so the ? is 9.

8 0
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The answer to the question I believe is 3.
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Answer:

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Step-by-step explanation:

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//hope this helps//

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