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2 years ago

What is 'a)' on question 4?

Mathematics

1 answer:

Nikolay [14]2 years ago

3 0

A = 4b

b = 7

a = 28

7 * 4 = 28

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Can somebody give me the answer

kobusy [5.1K]

No, mistake at s2, if there was 0x then they shouldn’t have written anything at all because there are 0 x’s!!!

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2 years ago

John saved money to have a party if he spends 2/8 of his money on food 1/5 of his money on prizes and 2/10 of his money on decor

Reil [10]

He will have 7/20 of his money left

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2 years ago

Solve 2x^3+7x^2-2x-1=o

Mashcka [7]

Answer:

$x=\sqrt{3}-2\\x=-\sqrt{3}-2\\x=\frac{1}{2}$

Step-by-step explanation:

This is a hard one

We have to use the rational root theorem

$2x^3+7x^2-2x-1$ = 0

We have to find all the factors of a and d and put them in a fraction

$a=2\\d=-1\\\frac{1}{1,2}$

We then plug them into the equation to see if any of them work

The equation isn't true when plugging 1, but is true when plugging in 1/2

factored form of 1/2 is (2x-1)

Then we divide the original equation by (2x-1) (you can use synthetic division or long division, it would be hard to type out the process for that) to get $x^2+4x+1$

So now the equation is $(2x-1)(x^2+4x+1)$

Solve the second half of this equation using the quadratic formula to get

$\sqrt{3}-2$ and $-\sqrt{3}-2$

We already know the solution for the first half of the equation (1/2)

So the final answers are:

$x=\sqrt{3}-2, -\sqrt{3}-2, \frac{1}{2}$

8 0

2 years ago

What is the distance between 5,-6 and 5,6

ira [324]

Answer: 12

Step-by-step explanation:

I will assume those are coordinates.

The distance between 2 points is given by √ (x2 − x1)^2 + (y2 − y1)^2.

Replacing the values, we get √ (5 − 5)^2 + (6 − -6)^2 = √0+144 = 12

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2 years ago

The formula for converting a Celsius temperature to a Fahrenheit temperature is: F = C × 9⁄5 + 32 If C = 100 degrees, what is th

zmey [24]

F = 1.8C + 32
F = 1.8(100) + 32
F = 180 + 32
F = 212 degrees

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2 years ago