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Shalnov [3]
4 years ago
5

What 2 numbers multiply to -63 and add up to 7

Mathematics
1 answer:
KiRa [710]4 years ago
6 0
2 numbers multiply to -63 and add up to 7
Forming the equation, we need to let
x = first number
y = second number

xy = -63
x+y = 7 --> y = -x + 7

x (-x + 7) = 63
-x^2 +7x = 63
x^2 - 7x = -63
x^2 - 7x + 63 = 0

From the equation above, you need to find the roots.
After getting the roots, then you can decide that those are the two numbers.
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Very large and very small numbers are easier to write in scientific notation. For example, the number, 2360000 would be written
Vedmedyk [2.9K]

1.23e-4 is the same as 1.23 * 10^-4

So, 2.36e6 would be your answer

7 0
3 years ago
Given that < DAB and < DCB are right angles and m < DBC = 42, what is the measure of CAB
zhenek [66]

Please consider the attached diagram.

We have been given that angle DAB and angle DCB are right angles. We are also told that measure of angle DBC is 42 degrees. We are asked to find the measure of arc CAB.  

We can see that angle DBC is inscribed angle of arc DC, so measure of arc DC is two times the measure of angle DBC.

\widehat{DC}=42^{\circ}\times 2=84^{\circ}

We can also see that segment DB is diameter of given circle as inscribed angle of diameter is a right angle.

Since segment DB is diameter of given circle, so measure of arc DAB would be equal to half the measure of 360 degrees.

\widehat{DAB}=\frac{360^{\circ}}{2}=180^{\circ}

\widehat{CAB}=\widehat{CD}+\widehat{DAB}

\widehat{CAB}=84^{\circ}+180^{\circ}

\widehat{CAB}=264^{\circ}

Therefore, the measure of arc CAB is 264 degrees.

6 0
3 years ago
Does anyone know this math problem?
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If you were to buy a two day ticket for $68 every 3 weeks for all four seasons then you would spend $1156 overall. By buying a gold pass for $120 for all four seasons you would save $1036. For sure get the Gold Pass no questions asked.
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3 years ago
Which expressions are equivalent to 2-(-6+3)+4c
Artyom0805 [142]

Answer:

c. none of the above

Step-by-step explanation:

(-6+3)= -3

2--3=2+3=5

5+4c cant add them since they arent like terms

final answer 5+4c and that option isnt here

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3 years ago
Find the area of the following figure.
Dvinal [7]

Answer:

Just do time table multply all your numbers and you will get the area bc i cant see the pic

Step-by-step explanation:

7 0
3 years ago
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