What is
4(2y+5) + (-6-4y)

Answers

Answer 1

Answer: the answer is 6(4y-1)

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At a local river there were 48 alligators laying on the riverbank. if 7/8 of the alligators were sleeping how many were awake

Answers

If there were 48 aligators just divide it by eight, and you get the answer which is 6

Marisa wants to buy a DVD player that runs for at least $150. She already saved $ 80 and plans to save an additional $ 10 each week. Write an inequality that represents this problem and explain your answer in detailed steps.

Answers

x=number of weeks
the inequality is:
10x+80≥150

Now, we solve this inequality:
10x+80≥150
10x≥150-80
10x≥70
x≥70/10
x≥7

Solution: Marisa needs to save at least 7 weeks for she can buy the DVD

Solve the system belowy=x^2-2x-6
y=4x+10

A. (-2,2)
B. (8,42)
C. (-2,2)
D. No solution

Answers

There are several ways to solve systems of linear equations. The most common methods are by graphing, elimination, and substitution. Let's start off with one of the most basic methods, graphing.
---------------Graphing Method---------------
2x + y = 33x + 2y = 6
In order to solve this system using the graphing method, we first have to change the two equations into slope-intercept form.
2x + y = 3 --> y = -2x + 33x + y = 7 --> y = -3x + 7
Then, we graph these two lines. (Attached Below)The solution set of a system of linear equations when graphing is actually the point at which the two lines intersect. So by graphing the two lines, we can obviously see that the solution set of this problem is (4, -5).
---------------Elimination Method---------------
The concept of elimination revolves around the concept of adding two equations. Using an example, let's see what happens when you add equations together.
2x + y = 33x + 2y = 6-----------5x + 3y = 9
Do you see how this works? Now, let's say that the orientation of these two equations were different. What would you do then?
2x + y = 36 - 3x = 2y
If this situation occurs, you have to rearrange it in a way that the form of the equations match. For example, if you have one in standard form, you have to algebraically return the other equation to the same form.
2x + y = 36 - 3x = 2y --> 6 = 3x + 2y --> 3x + 2y = 6
Now that the equations are in the same form, we can begin to solve. However, let's start with a simpler system to demonstrate the concept.
2x - y = 53x + y = 5
The process of elimination involves adding equations in a way that one of the unknown variables disappears. In this first example, let's see what happens when we simply add them right away.
2x - y = 53x + y = 5

Sherry bought 6 apples at 43¢ per apple. She then bought 4 oranges at 51¢ per orange. How much was her grocery bill?

Answers

Answer:

$4.62

Step-by-step explanation:

6x.43=2.58

4x.51=2.04

2.58+2.04=4.62

four dollars and 62 cents ($4.62)

10+-2f^2+-6+7+-2f^2+-9f

Answers

$10+-2f^2+-6+7+-2f^2+-9f = 10-2f^2 -6+7-2f^2 -9f \n\n= -2f^2 -2f^2 -9f+10-6+7= \boxed {-4f^2 -9f +11}$

$10+(-2f^(2))+(-6)+7+(-2f^(2))+(-9f)=10-2f^2+1-2f^2-9f$

$-4f^2-9f+11=-(4f^2+9f-11)$

Mary earns $5 per hour as a waitress. Last week she took home her regular earnings of $5 per hour plus $186 in tips for a total of $301. Which equation can be used to find how many hours, h, Mary worked last week?A.
$301 = $5h + $186
B.
$301 = $186h + $5
C.
$301 = $186h - $5
D.
$301 = $5h - $186