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Rufina [12.5K]
3 years ago
12

Evaluate if x = 13 and y = –4. 3(2x – y) A. 82 B. –15 C. 90 D. –63

Mathematics
1 answer:
Taya2010 [7]3 years ago
6 0
3(2x-y)=3(2*13+4)=3(26+4)3*30=90

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5. Write the slope-intercept form of the equation that passes through the point (-1, 2) and is perpendicular to the line y = 3/2
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Answer:

D.  y = -2/3 x + 4/3

Step-by-step explanation:

When you have a perpendicular line, everything except the y-intercept becomes opposite. So 3/2x + 6 will become -2/3x.

To find the slope, you have to plug the coordinates into the equation so far which is y = -2/3x + b

y = -2/3x + b

2 = -2/3(-1) + b

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4/3 = b

So the equation is y = -2/3 x + 4/3.

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3 years ago
Solve the proportion 26/z=13/22
Setler79 [48]
Z=44

Solve the rational equation by combining expressions and isolating the variable z
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Answer:

86° Fahrenheit

Step-by-step explanation:

F=1.8C + 32

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Plugging into the formula:

F=1.8*30+32\\F=54+32\\F=86

The Fahrenheit for 30° Celsius using the given formula is 86° Fahrenheit.

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3 years ago
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HELPP!!! Will give Brainliest!!!
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the local maximum is at x = -2.2 and has a value of 72.576


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The given parabola is y+4=12(x-7)^2. Compare with the standard equation of a parabola in vertex form, y-c=a(x-b)^2.

The vertex of this parabola is (b,c). Compare y+4=12(x-7)^2 with the standard equation y-c=a(x-b)^2.

we see c=-4,b=7. Thus, the vertex of the given parabola is (7,-4).


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3 years ago
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