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3 years ago

3v² - 54v + 240 = 0 Factoring

Mathematics

1 answer:

babunello [35]3 years ago

7 0

Answer:

v = 10 , 8

Step-by-step explanation:

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5/8=1/2/x solve for x.

just olya [345]

Answer:

4/5

Step-by-step explanation:

5/8=1/2/x

x=(1/2)/(5/8)

x=(1/2)(8/5)

x=8/10

simplify

x=4/5

7 0

3 years ago

Make x the subject of the formula 3(c - bx) = 18

MrRa [10]

Answer:

x = c - a / -b

Step-by-step explanation:

8 0

3 years ago

Multiply (sqrt 10 + 2 sqrt 8) (sqrt 10 -2 sqrt 8)

sveta [45]

$(\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8}) = -22$

Solution:

Given that we have to multiply the given expression

Given is:

$(\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8})$

We have to multiply the above expression

Apply the difference of two squares formula

$(a+b)(a-b) = a^2-b^2$

Similarly for,

$(\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8})$

We have,

$a = \sqrt{10}\\\\b = 2\sqrt{8}$

Thus the equation becomes,

$(\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8}) = (\sqrt{10})^2 - (2\sqrt{8})^2\\\\Simplify\\\\(\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8}) =(\sqrt{10} \times \sqrt{10}) - (2\sqrt{8} \times 2\sqrt{8})$

Use the below rule,

$\sqrt{a} \times \sqrt{a} = a$

Therefore, the above equation becomes,

$(\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8}) =10 - 4 \times 8\\\\(\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8}) = 10 - 32\\\\(\sqrt{10} + 2\sqrt{8})(\sqrt{10} - 2\sqrt{8}) =-22$

Thus upon multiplying the given expression, solution is -22

8 0

3 years ago

Read 2 more answers

Can someone help me out?

Alexeev081 [22]

Answer: factorise the equation 49x^2+70x+25

Step-by-step explanation:

49x^2+70x+25

(7x)^2+2*7x*5+(5)^2

(7x+5)(7x+5)

therefore the sides of the square are (7x+5)(7x+5)

7 0

3 years ago

a two number digit is chosen at random , what is the probability that the chosen number is a multiple of 7

ExtremeBDS [4]

13/90

so there are 90 two digit numbers.
there are a 13 two digit numbers divisible by 7. so there is a 13/90 probability of a two digit number being selected at random that’s divisible by 7

7 0

3 years ago