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3 years ago

How do you do this

Mathematics

2 answers:

poizon [28]3 years ago

8 0

Answer:

The best choice is to use a calculator (the button is $\sqrt$ ), but if that is not an option here are a few tips.

If a perfect square ends with a 1, then the last digit of its square root has to be either 1 or 9.

If a perfect square ends with a 4, then the last digit of its square root has to be either 2 or 8.

If a perfect square ends with a 5, then the last digit of its square root is definitely 5.

If a perfect square ends with a 6, then the last digit of its square root has to be either 4 or 6.

If a perfect square ends with a 9, then the last digit of its square root has to be either 3 or 7.

I took a look and all of them seem to be perfect squares so hopefully this helps!

VladimirAG [237]3 years ago

4 0

You square it so for example the first one would be 1

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Factoring 0=6X^2+x-7

trapecia [35]

The answer is X=-7 and X=6

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3 years ago

Solve for x. enter your answer in interval notation using grouping symbols. x^2+15x<-36

Oliga [24]

X²+15x+36<0

at first solve quadratic equation

D=b²-4ac= 225-4*1*36= 81

x=(-b+/-√D)/2a
x=(-15+/-√81)/2= (-15+/-9)/2
x1=(-15-9)/2=-12
x2=(-15+9)/2=-3

we can write x²+15x+36<0 as (x+12)(x+3)<0

(x+12)(x+3)<0 can be 2 cases, because for product to be negative one factor should be negative , and second factor should be positive
1 case) x+12<0, and x+3>0,
x<-12, and x>-3
(-∞, -12) and(-3,∞) gives empty set

or second case) x+12>0 and x+3<0
x>-12 and x<-3
(-12,∞) and (-∞,-3) they are crossing , so (-12, -3) is a solution of this inequality

3 0

4 years ago

Please answer this!!!!!!!!!!

inysia [295]

Answer: Dylan

Step-by-step explanation:

Dylan because i it has 8 sides and if each student rolls it 200 times, then you should divide 200 by 8. Which would make the odds 1/25. And Dylan´s number is closest to 25.

5 0

3 years ago

Nicole had already run 17 miles on her own and expects to run 1 mile during each track practice. How many miles would nicole hav

Volgvan

Answer: 19 mile

Explanation:

Each track practice = 1 mile

And she had run 17 miles on her own.

After 2 track practices she would have run 17 mile + 2 mile = 19 mile

5 0

3 years ago

No Solutions 3x+9+4x+x

noname [10]

Answer:

8x+9

Step-by-step explanation:

You need to group your like terms : (3x+4x+x)+9 = 8x+9

Hope this helps! Just always remember to combine like terms first, and then you will get your soltution faster and easier.

7 0

2 years ago

How do you do this ​

How do you do this