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rusak2 [61]
3 years ago
11

If a= -3 what is 3a^2

Mathematics
1 answer:
trapecia [35]3 years ago
4 0

Answer:

27

Step-by-step explanation:

If a= -3 what is 3a^2 = 27

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What is the equation for a line passing through (-2,3) and perpendicular to y= -1/2+1 ?
nata0808 [166]

Answer:

y=2x+7

Step-by-step explanation:

<u><em>The correct question is</em></u>

what is the equation for a line passing through (-2,3) and perpendicular to y= -1/2<em>x</em>+1 ?

Remember

If two lines are perpendicular, then their slopes are opposite reciprocal (the product of their slopes are equal to -1)

The slope of the given line is m=-1/2

so

the opposite reciprocal is m=2

<em>Find the equation of the line in point slope form</em>

y-y1=m(x-x1)

we have

m=2\\point\ (-2,3)

substitute

y-3=2(x+2)

<em>Convert to slope intercept form</em>

y=mx+b

isolate the variable y

y-3=2x+4

y=2x+4+3

y=2x+7

3 0
3 years ago
What is 2.346 as a percent
34kurt

Answer:

Step-by-step explanation:

to turn a decimal to a percent, multiply by 100.....or if there is a decimal in there, start from the decimal and just move 2 spaces to the right.

2.346 = 234.6%

and just so you know, to turn a percent to a decimal, divide by 100...or move the decimal point 2 spaces to the left

6 0
4 years ago
A car seller buys a car from a manufacturer for 10,000. He increases the cost by 5 percent. What is the markup amount?
Ksenya-84 [330]
The seller marks up the price by $500, for a grand total of $10,500
7 0
3 years ago
For a 30 sided polygon, what is the degree of rotation?
ratelena [41]


interior angle of n-gon formula: 180 - ( 360 / n) 
a 30 sided polygon, so in this case n = 30
so
interior angle = 180 - ( 360 / 30) 
interior angle = 180 - 12
interior angle =  168

answer
168 degrees
3 0
4 years ago
Read 2 more answers
How to find 4x=14y and if it is parallel, perpendicular or neither to -2x+7y=14
RUDIKE [14]
4x = 14y
y = 4/14(x)
y = 2/7(x) slope = 2/7

<span>-2x+7y=14
7y = 2x + 14
  y = 2/7(x) + 2 slope = 2/7

parallel lines, slope is the same
both lines have slopes equal 2/7

answer
</span><span>parallel</span>
7 0
3 years ago
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