I need the answers plz

Mathematics

1 answer:

enyata [817]3 years ago

4 0

In order to simplify an expression you have to have the same variables, to the same power.

1a) There are no more H's or numbers without a variable.

1b) The variables do not match.

1c) The variable is to a different power so it can't be simplified.

So to simplify you combine your "like terms"

2a,b, and c are correct :)

2d) already simplified

2e) since the variables are the same, just focus on the numbers (x=h since it won't let me use it) answer: 6x
$10x - 4x \\ 10 - 4 = 6 \\ 6x$
2g) For this one 9 has no variable and no like terms, so it stays by itself, just focus on the a's (x=a) answer: 9+4x
$9 + 7x - 3x \\ 7 - 3 = 4 \\ 9 + 4x$
2j) answer: 11y^2+5y
$8y + 6y {}^{2} - 3y + 5y {}^{2} \\ 8y - 3y = 5y \\ 6y {}^{2} { + 5y} {}^{2} = 11y {}^{2} \\ 11y {}^{2} + 5y$

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Y^3-9y^2+y-9 I don't know how to solve this can you help

aleksley [76]

I'm guessing your problem is this:
y³ - 9y² + y - 9 = 0
right?

In solving this problem, I recommend doing this:
y³ - 9y² + y - 9 = 0
Factor out a y² from the first two numbers in the problem:
y²(y - 9) + (y - 9) = 0
Separate the parentheses which means y - 9 goes on one side. The y² added a one since it came from the + 1 in the middle of expression. When you're separating parentheses like this you just take the outside numbers and combine them together. Since + 1 came from the outside of the (y - 9) and y² also was sitting on the outside of (y - 9) combine them to make y² + 1. Like this:
(y² + 1)(y - 9) = 0
Now separate your two parentheses to two separate problems:
(y² + 1) = 0 and (y - 9) = 0
Now you're y² + 1 will equal:
y² = -1
y = √-1 <-- This number doesn't exist so it will be an imaginary number (i). If you guys didn't learn that in your class I recommend just leaving it as i for that part.
Now solve y - 9 = 0:
y = 9 <-- Since we added nine to both sides to get this.

So you're final answer should be y = i and 9

3 0

3 years ago

The value of Sara's new car decreases at a rate of 8% each year. Write an exponential function to model the decrease in the car'

creativ13 [48]

8% less
100-8=92

P=present amount
F=future amount=f(t)
t=time in years
rate of decay is 8% or times 92%

$F=P(0.92)^t$ is the equation or
$f(t)=P(0.92)^t$ is the equation or

8 0

3 years ago

Autumn buys eggs and apples at the store.

soldier1979 [14.2K]

Answer:

$\frac{(5.76-34.14)}{6}$