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NeTakaya
3 years ago
12

How do I solve 4a-3=2a+7

Mathematics
1 answer:
IRINA_888 [86]3 years ago
6 0
1).  Subtract  2a  from each side.        2a - 3  =  7

2).  Add  3  to each side:                       2a        =  10

3).  Divide each side by  2 :                  <em>  a        =  5</em>
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Please answer all please​
Firdavs [7]

Answer:

Step-by-step explanation:

The first parabola has vertex (-1, 0) and y-intercept (0, 1).

We plug these values into the given vertex form equation of a parabola:

y - k = a(x - h)^2 becomes

y - 0 = a(x + 1)^2

Next, we subst. the coordinates of the y-intercept (0, 1) into the above, obtaining:

1 = a(0 + 1)^2, and from this we know that a = 1.  Thus, the equation of the first parabola is

y = (x + 1)^2

Second parabola:  We follow essentially the same approach.  Identify the vertex and the two horizontal intercepts.  They are:

vertex:  (1, 4)

x-intercepts:  (-1, 0) and (3, 0)

Subbing these values into y - k = a(x - h)^2, we obtain:

                                            0 - 4 = a(3 - 1)^2, or

                                                -4 = a(2)².  This yields a = -1.

Then the desired equation of the parabola is

y - 4 = -(x - 1)^2

7 0
3 years ago
Suppose that in a normal half hour of practice, a tennis player expends 280 calories of energy.
sertanlavr [38]

Answer:

308 Calories

Step-by-step explanation:

So we start off with 280 as usual, but I will focus on the percent. The given percent is 110% "effort". What we would need to do here is, Firstly, change the percent into a decimal, and this is done by moving the decimal spot of 110%. What I mean is that 110.% and you move that little period over 2 times to the left and also remove the percent as for now because we will not need it. After that you would get 1.10. This is what we will multiply by. So if we did 280x1.10 it equals 308, and that is how I got 308

Hope this helps!

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3 years ago
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Nady [450]
It’s A. 45.


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3 years ago
What's total area of cube and cuboid?​
Anettt [7]

Answer: Where is the image or PDF?

5 0
2 years ago
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What is the simplified form of 2 times 10 squared to the second power in standard notation?
Semmy [17]
<span>2 times 10 squared to the second power in standard notation

2 x(10^2)^2
=2x10^4
=20000</span>
4 0
3 years ago
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