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Degger [83]
3 years ago
11

What number is half way between 21 and 63?

Mathematics
1 answer:
andre [41]3 years ago
8 0
The # halfway in between 21 and 63 is 42.
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The archway of the main entrance of a university is modeled by the quadratic equation
Scilla [17]

Answer:

B. (1,5) and (5.25, 3.94)

Step-by-step explanation:

The answer is where the 2 equations intersect.

We need to solve the following system of equations:

y = -x^2 + 6x

4y = 21 - x

From the second equation:

x = 21 - 4y

Plug this into the first equation:

y = -(21 - 4y)^2 + 6(21 - 4y)

y = -(441 - 168y + 16y^2)+  126 - 24y

y = -441 + 168y - 16y^2 +  126 - 24y

16y^2 + y - 168y + 24y + 441 - 126 = 0

16y^2 - 143y + 315 = 0

y = [-(-143) +/- sqrt ((-143)^2 - 4 * 16 * 315)]/ (2*16)

y = 5, 3.938

When y = 5:

x = 21 - 4(5) = 1

When y = 3.938

x = 21 - 4(3.938) = 5.25.

3 0
3 years ago
Help me please!! As soon as you can!!
Mrrafil [7]
The answer: X plus X+4
3 0
3 years ago
kinata goes for swimming lessons every 5 days while wayo goes every 6 days. if both kinata and wayo had lessons together at the
eduard
5*6=30
and 6*5=30
basically we have to take Lcm of 5 and 6=30
30th day they both will be together
4 0
3 years ago
The solution to this system of equations lies between the x-values -2 and -1.5. At which x-value are the two equations approxima
katovenus [111]
D) -1.8
-1.8
6 0
3 years ago
Read 2 more answers
HELP HELP HELP Find X for the log function!<br><br> Please include the steps
Keith_Richards [23]

Answer: yield x

Step-by-step explanation: Definition. The logarithm is denoted "logb x" (pronounced as "the logarithm of x to base b" or "the base-b logarithm of x" or (most commonly) "the log, base b, of x"). In the equation y = logb x, the value y is the answer to the question "To what power must b be raised, in order to yield x?".

7 0
2 years ago
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