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3 years ago

Can you help me with this problem

Mathematics

1 answer:

kumpel [21]3 years ago

6 0

I think it’s statistics

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Which choice is equivalent to the expression √20 + √80

salantis [7]

Answer:

13.41

Step-by-step explanation:

Hope it helps!

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3 years ago

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Which would be the best method to use to solve the following equations? Explain your reasoning.

o-na [289]

A. square root property

$3x^2-192=0\\x^2-66=0\\x^2=66\\x= -\sqrt{66} or \sqrt{66}$

it has one value with x which is x^2 and it cn be easily solved without having to factorise, quadratic formula cant be used as it need ax^2+bx+c=0 format

B. factorising

$x^2-x-6=0\\x^2+2x-3x-6=0\\(x+2)(x-3)=0\\x+2=0 and x-3=0\\x= -2 \\x= 3$

i just felt like this was easier to factorise than the other 2 options left

C. Completing the square

$x^2-6x-7=0\\(x-3)^2=0\\x= -1\\x= 7$

same reason personal preference

D- Quadratic

$x^2-17x-7=0\\x=\frac{-(-17)+\sqrt{(-17)^2-4(1)(-7)} }{2(1)} \\x=\frac{-(-17)-\sqrt{(-17)^2-4(1)(-7)} }{2(1)}\\x=17.4\\x=-0.402$

the 17 kinda threw me off and i didnt wanna get on factorising or doing completing the square so quadratic formal

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3 years ago

1 liter is equal to how many cubic centimeters?

Alika [10]

Answer:

1000

Step-by-step explanation:

7 0

3 years ago

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Help with steps <br>questions on image

Sveta_85 [38]

Answer:

Step-by-step explanation:

all odd numbers possible: 1, 3, 5, 7

__ __ __ __

there are 4 possibilities for the first blank

for the second blank there are 4-1 = 3 possibilities as one of the numbers will have been used

for the third blank there are 4-2 = 2 possibilities as 2 of the numbers have been used

for the last blank there is only 1 possibility

so the number of solutions possible is 4 x 3 x 2 x 1 = 24

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3 years ago

In his garden jim is using cone shape planters for his happing plants has a diameter of of 8 inches and a height of 13 inches he

Dmitry_Shevchenko [17]

Answer:12

Step-by-step explanation:

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3 years ago