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Mathematics, 22.06.2019 21:20 skyefricke1139

Question 9 (1 point) write and solve an inequality or multiple inequalities to describe the possible values of x. m 102 8 (7x+4)

Answers

ansver
Answer from: 11needhelp11

70-40=6(x)

'x' is the number of questions that must be answered

Step-by-step explanation:

ansver
Answer from: Naomi7021

Problem 1. D

Problem 2. A

Problem 3. C

Problem 4. D

Step-by-step explanation:

Problem 1:

A pack is targeted to weigh 9.25 oz.

A pack can be up to 0.23 oz off, either over or under weight.

The pack cannot weigh less than 9.25 oz - 0.23 oz or more than 9.25 oz + 0.23 oz.

The following compound inequality represents the rejected weights.

x < 9.25 - 0.23  or x > 9.25 + 0.23

Subtract 9.25 from both sides of both inequalities.

x - 9.25 < -0.23 or x - 9.25 > 0.23

Change to an absolute value inequality.

|x - 9.25| > 0.23

x - 9.25 < -0.23 or x - 9.25 > 0.23

x < 9.02 or x > 9.48

Problem 2:

Almond trees produce 12a

Macadamia nut trees produce 8m

Yield is 250

12a + 8m = 250

Problem 3:

8.8 m/s converted into km/h

1000 m = 1 km

60 sec = 1 min

60 min = 1 hr

8.8 m/s * (1 km)/(1000 m) * (60 s)/(1 min) * (60 min)/(1 hr) =

= 31.68 km/h

Problem 4.

Let number of alternative schools be a.

Let number of charter schools be c.

"the number of charter schools is 4 less than twice the number of alternative schools"

c = 2a - 4

There are 48 charter schools, so c = 48. Now we solve for a.

48 = 2a - 4

52 = 2a

a = 26

ansver
Answer from: irene27

x < 5.1

Step-by-step explanation:

Let's define:

α: opposite angle to side 8 on the left triangleβ: the angle between sides 8 and 10 on the left trianglex: missing side of both triangles

Using Law of Sines we can find x, as follows:

10/sin(95°) = 8/sin(α)

sin(α) = sin(95°)*8/10

α = arcsin(0.8) = 53.13°

β = 180° - 95° - 53.13° = 31.87°

x/sin(β) = 10/sin(95°)

x = 10/sin(95°)*sin(31.87°)

x = 5.3

On the other hand, we know that the addition of the two shorter sides of a triangle must be greater than the long side of the triangle. Therefore:

8 + 5.3 > 3x - 2

Solving:

8 + 5.3 + 2 > 3x  

15.3/3 > x

5.1 > x

or

x < 5.1

ansver
Answer from: kylebenson
I believe that the answer is C.
ansver
Answer from: thedocgalloway
To find this, you must find the total number of point Sara has scored already.  She has answer 10 multiple choice questions which are 4 points each.  This means that Sara has scored 40 points so far.

If Sara wants to score at least 70 points, she needs to score at least 30 more points.  To find how many open ended questions she needs to answer, you need to divide the remaining number of points by the number of points an open ended question is worth.  The number we get will be x.

30/5 = 6

This means Sara must complete at least 6 open ended questions to score 70.  Now all we have to do is figure out which inequality sign to use.  Since Sara wants to score more than 70 points, it should be the "greater than" sign.

Your answer is:  x>6  (The first selection)

Hope this helps! :)

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