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Anastasy [175]
3 years ago
10

Solve the equation using mental math.

Mathematics
2 answers:
Umnica [9.8K]3 years ago
4 0

I guess answer should be C

ki77a [65]3 years ago
3 0
Answer is C. 3 start fraction 5 over 7 end fraction.
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X^2 + 32x + 256 = 1<br>please show steps​
Elena L [17]

\boxed{x_{1}=-15} \\ \\ \boxed{x_{2}=-17}

<h2>Explanation:</h2>

In this case, we have the following equation:

x^2+32x+256=1

But we can write this equation as:

x^2+32x+256=1 \\ \\ Subtract \ -1 \ from\ both \ sides: \\ \\ x^2+32x+256-1=1-1 \\ \\ x^2+32x+255=0

So this final result is a quadratic equation written in Standard Form (ax^2+bx+c=0). We need to find the solutions to this equations, so let's use quadratic formula:

x=\frac{-b \pm \sqrt{b^2-4ac}}{2a} \\ \\ a=1 \\ b=32 \\ c=255 \\ \\ \\ x=\frac{-32 \pm \sqrt{(32)^2-4(1)(255)}}{2(1)} \\ \\ x=\frac{-32 \pm \sqrt{1024-1020}}{2} \\ \\ x=\frac{-32 \pm \sqrt{4}}{2} \\ \\ x=\frac{-32 \pm 2}{2} \\ \\ Finally, \ two \ solutions: \\ \\ \boxed{x_{1}=-15} \\ \\ \boxed{x_{2}=-17}

<h2>Learn more:</h2>

Quadratic Equations: brainly.com/question/10278062

#LearnWithBrainly

3 0
3 years ago
Is JH is the perpendicular bisector of GI what is GH?
soldi70 [24.7K]

Answer:

GH=12

Step-by-step explanation:

Definition of a perpendicular Bisector: a perpendicular bisector intersects another line segment at 90° and divides it into two equal parts.

Therefore it divides the line GI into two equal parts. That means that GH=HI and it was given that HI=12.

3 0
2 years ago
Find the average of$ 1148.37,$1760.44,$1143.57,and 1336.17 then round to the nearest cent
schepotkina [342]
If you total them it equals $5388.55. and then divide by 4 and the average is 1347.1375 and the you round to nearest cent. $1347.14
3 0
4 years ago
6 + 12 = 25 -<br> Which value makes the number sentence true?<br> A. 6<br> B. 7<br> C. 12<br> D. 18
max2010maxim [7]

Answer:

7

Step-by-step explanation:

6+12=18

25-7=18

7 makes the sentance true.

4 0
3 years ago
HURRY UP I AM DIENG I WILL GIVE BRAINLIESTThe area of the parallelogram below is ____ square meters.
polet [3.4K]

Answer:

42m

Step-by-step explanation:

First we need to find the base, which is 6 and the height which is 7. Then, multiply 6 and 7 to get 42. Then add your units, which are meters. So, 42m is your answer. I hope this helps! :)

7 0
2 years ago
Read 2 more answers
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