Maths gcse please help me

Mathematics

2 answers:

VikaD [51]3 years ago

4 0

Ratio of Ed's share to Dave's share is 4:5.

rosijanka [135]3 years ago

3 0

Im sorry wish i could help but the equation is a little confusing give me a few moments and i will figure out the answer okay?

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What is (f⋅g)(x)? f(x)=x2−2x+3 g(x)=x3−4

Papessa [141]

Answer:

Step-by-step explanation:

(f.g)(x) = (x² - 2x + 3) (x³ - 4)

= x²* (x³ - 4) - 2x* (x³ - 4) + 3 * (x³ - 4)

= x²*x³ - x²*4 - 2x*x³ - 2x*(-4) + 3*x³ - 3 * 4

= x⁵ - 4x² - 2x⁴ + 8x + 3x³ - 12

= x⁵ - 2x⁴ + 3x³ - 4x² + 8x - 12

7 0

3 years ago

How do i solve systems of equations by elimination?

stiv31 [10]

First make sure that one of the variable has the same coefficient in each equations.

For example lets use:
y=x+3
2y=3x-1

Since neither the y's or x's are the same, we must multiply the equations to make them the same. I am going to multiply the first equation by 2 so I can eliminate the y's.

So we get:
2y=2x+3
2y=3x-1

Then we subtract the second equation from the first to eliminate the y's. So we end up with 0=-x+4 and now we solve for x
0=-x+4
x=4

Now we plug in our x into either original to get the y-value. I am using the first
y=x+3
y=4+3
So the x=4 and y=7

Hope this helps!

6 0

3 years ago

A particular type of cell increases by 75% in number every hour. Find the number of cells present at the end of 12 hours if ther

prisoha [69]

We have been given that a particular type of cell increases by 75% in number every hour. We are asked to find the number of cells present at the end of 12 hours if there are initially 4 of these cells.

We will use exponential growth formula to solve our given problem.

$y=a\cdot (1+r)^x$ , where,