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shutvik [7]
3 years ago
15

Select the correct answer.

Mathematics
1 answer:
aleksandrvk [35]3 years ago
3 0
E. 9:12...............
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Write an equation of a line perpendicular to y=4x-3 that contains the point (0,7)
ExtremeBDS [4]

Let k:y=m_1x+b_1 and l:y=m_2x+b_2

l\ \perp\ k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}

We have

y=4x-3\to m_1=4

Therefore

m_2=-\dfrac{1}{4}

We have the equation of a line:

y=-\dfrac{1}{4}x+b

Put the coordinates of the point (0, 7) to the equation of a line:

7=-\dfrac{1}{4}(0)+b\\\\\7=b\to b=7

Answer: \boxed{y=-\dfrac{1}{4}x+7}

8 0
3 years ago
Graph the function <br>y=3/2x+1​
Fiesta28 [93]
This is the graph for the function

5 0
3 years ago
Simplify the expression below. (-3x2 + 2x - 4) + (4x2 + 5x +9)
TiliK225 [7]

Answer: =x2+7x+5

Step-by-step explanation:

−3x2+2x−4+4x2+5x+9

=−3x2+2x+−4+4x2+5x+9

Combine Like Terms:

=−3x2+2x+−4+4x2+5x+9

=(−3x2+4x2)+(2x+5x)+(−4+9)

=x2+7x+5

Answer:

=x2+7x+5

4 0
3 years ago
Read 2 more answers
Sonia graphs the equations y = –x2 + 4x and y = x – 4 to solve the equation –x2 + 4x = x – 4. Her graph is shown below.
ipn [44]
The line and parabola intersect at x=-1 and x=4, so your solution is C. –1 and 4
3 0
3 years ago
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Harry works in a local computer store and he kept a record of the number of computers sold each month for the past year. How man
goldfiish [28.3K]

Answer:

A.) 20

Step-by-step explanation:

According to the bar graph, in February, the store sold 50 computers. In September, it seems like the store sold 30 computers. Therefore, if 50 - 30 = 20, the store sold 20 more computers in February than in September.

8 0
2 years ago
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