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Mademuasel [1]
4 years ago
15

In two or more complete sentences, describe how to find the interval(s) where the function is decreasing and how interval notati

on is used to express the interval(s). In your final answer, include the interval in which the function is decreasing.
Mathematics
1 answer:
lapo4ka [179]4 years ago
3 0

Answer:

The function is increasing when the slope is greater than zero and decreasing when the slope is less than zero.  Slope is (y2-y1)/(x2-x1) or the change in y divided by the change in x.

In this case the function is decreasing when x=[-8,-5) and when x=[4,8)

So in interval notation:  x=[-8,-5)U[4,8)

Step-by-step explanation:

BRAINLIEST PLEASE

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College student makes decorative Styrofoam Lions and Husky's which she sells each year. Each one uses 8 oz of Styrofoam and take
Travka [436]

Answer:

She should make 122 Styrofoam lions and 268 Styrofoam Husky's

The maximum profit, she makes is  $1109

Step-by-step explanation:

The given information are;

The volume required to make each lion = 8 oz

The time it takes to make each lion = 35 minutes

The amount of profit each lion brings = $2.50

The volume required to make each Husky = 12 oz

The time it takes to make each Husky = 20 minutes

The amount of profit each Husky brings = $3

Let the number of lion Styrofoam cups she makes = x

Let the number of Husky Styrofoam cups she makes = y

Therefore, we have;

x × 35 + y × 20 = 9650..........(1)

x × 8 + y × 12  = 3840.............(2)

Dividing equation (2) by 8 and making x the subject, we get;

x × 8/8 + y × 12/8  = 3840/8

x + 4/3·y = 480

x = 480 - 4/3·y

Substituting the value of x in equation (1) gives;

(480 - 4/3·y) × 35 + y × 20 = 9650

16800 - 80/3·y = 9650

y = 268.125

x = 480 - 4/3·y  = 480 - 4/3×268.125 = 122.5

Therefore, she can make 122 Styrofoam lions and 268 Styrofoam Husky's

The maximum profit, she makes is therefore given by the following equation;

The maximum profit = 122 × 2.5 + 268 × 3 = $1109.

5 0
3 years ago
Please help to answer this question. 15 points
lisabon 2012 [21]
7. 8+7=15 and 15/2=7.5 BUT they are asking for FULL LESSONS so it cannot be a decimal. Therefore it is 7.
5 0
4 years ago
Read 2 more answers
What is the <br> axis of symmetry and vertex for the function f(x) = 3(x – 2)2 + 4
Vesna [10]
X=2, the x coordinate of the vertex! ;)
6 0
3 years ago
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Three solid shapes A,B and C The surface area of shape A is 9cm² The surface area of shape B is 16cm² The ratio of the volume of
dmitriy555 [2]

Answer:

9:20

Step-by-step explanation:

Given:

Surface area of shape A = 9 cm²

Surface Area of shape B = 16 cm²

Ratio of volume of shape A to B = 27:125

Required:

Find the ratio of the height of shape A to the height of shape C.

Ratio of surface area (A:B)² = ratio of linear measures (A:B)

Thus,

(A:B)² = (A:B)

(A/B)² = (A/B)

(\frac{A}{B})^2= (\frac{9}{16})

Take the square root of both sides:

(\sqrt{\frac{A}{B}})^2 = (\sqrt{\frac{9}{16}})

\frac{A}{B} = \frac{3}{4}

Ratio of volume of shape B to C = 27:125

Thus,

(B:C)³ = 27:125

(\frac{B}{C})^3= (\frac{27}{125})

Take the cube root of both sides:

(3\sqrt{\frac{B}{C}})^3 = (3\sqrt{\frac{27}{125}})

\frac{B}{C} = \frac{3}{5}

Therefore, ratio of lengths A:B:C =

3:4:C

A:3:5

To make them equivalent, we have:

9:12:C

A:4:20

Therefore, the ratio of the height of shape A to the height of shape C =

9:20

6 0
4 years ago
Rita earns $10 per hour. She puts 5% of her earnings in savings. Write an inequality to find how many hours h Rita must work to
Elena-2011 [213]
You do 10x+5+20
 
that should be the answer

4 0
3 years ago
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