1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
finlep [7]
3 years ago
8

I don't understand how to solve this, please help!

Mathematics
1 answer:
murzikaleks [220]3 years ago
7 0

Answer:

x+1 , x<-1

x²-bx-4  , -1≤x≤4

1/2 x +a

substitute x=-1 , continuous everywhere

x+1=x²-bx-4 when x=-1

-1+1=-1²-b-4

<h2>1+b-4=0 ⇒ +b-3 ⇒ b=3</h2>

then for :

x²-bx-4=1/2 x +a for x=4

4²-4b-4=1/2x+a

16-4(3)-4=4/2+a

16-12-4-2=a

<h2>a=-2</h2>

the equations will be :

x+1

x²-3x-4

1/2x-2

I hope this help

You might be interested in
What is the equation of the line that is parallel to y = 3x - 1 and goes through the point (0, 9)?
Mrac [35]

Answer:

Step-by-step explanation:

y - 9 = 3(x - 0)

y - 9 = 3x - 0

y = 3x + 9

8 0
3 years ago
The figure is made up of a cylinder and a sphere which has been cut in half. The radius of each half sphere is 5 mm. What is
alexgriva [62]
<h2>Answer:</h2>

<em>Rounded to the nearest hundredth the volume of the composite figure is:</em>

<em>1308 33 cubic millimeters</em>

<h2>Explanation:</h2>

Hello! I wrote the complete question in a comment above. The volume of a cylinder is defined as:

V_{c}=\pi r^2 h \\ \\ r:radius \\ \\ h:height

While the volume of half a sphere is:

V_{hs}=\frac{2}{3}\pi r^3

Since we have 2 half spheres, then the volume of these is the same as the volume of a sphere:

V_{s}=\frac{4}{3}\pi r^3

Then, the composite figure is:

V=\pi r^2 h +\frac{4}{3}\pi r^3 \\ \\ V=\pi r^2(h+\frac{4}{3}r)

The radius of the cylinder is the same of the radius of each half sphere. So:

r=5mm \\ \\ h=10mm \\ \\ \\ V=(3.14) (5)^2((10)+\frac{4}{3}(5)) \\ \\ V=25(3.14)(10+\frac{20}{3}) \\ \\ \boxed{V\approx 1308.33mm^3}

7 0
3 years ago
Use technology to find the​ p-value for the hypothesis test described below. the claim is that for a smartphone​ carrier's data
Mila [183]
Given that the sample size is 12, thus the degree of freedom = 12 - 1 = 11.

Using technology, the p value of the t statistic, t = 2.028 is 0.9663.
8 0
3 years ago
Read 2 more answers
PLS HELP
dybincka [34]
12.826+2.93= 15.756

Since you have to round it, your final answer would be 15.8
6 0
3 years ago
Read 2 more answers
The amount of green jelly beans in a bag is 25%. If there are 12 green jelly beans, how many total
maw [93]

Answer:

48

Step-by-step explanation:

25% is 1/4 of the bag. 12x4 = 48.

There are 48 jelly beans in the bag.

Hope that helps

8 0
2 years ago
Read 2 more answers
Other questions:
  • A carpenter divide the board that is 3.5 inches wide into 4 pieces of equal width by cutting it in 3 places. if the width of her
    14·1 answer
  • What is the fraction of this problem
    12·1 answer
  • The difference of the two solutions of x^2−17x+c=0 is 1. Find the solutions.
    12·1 answer
  • Homer and bart plan to buy one computer for 499.00 strictly for gaming purposes. Games cost 49.99 each. define each variable and
    11·2 answers
  • I need help, please :0
    8·1 answer
  • The fish eat about 12 ounces of food in 30 days. How many days would 50 ounces of food last
    12·1 answer
  • Find the perimeter of a 20 cm window
    11·2 answers
  • Select the polynomials that are a difference of squares.
    14·1 answer
  • Can anyone figure this out pls
    15·1 answer
  • Find the area and perimeter of a rectangle.<br> the length is x+6 the width is x+2
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!