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
Natalija [7]
3 years ago
10

Determine the direction that is parábola opens: y=4x^2+8x+2

Mathematics
1 answer:
marissa [1.9K]3 years ago
5 0
It should open up because the a which is 4 is positive
You might be interested in
If 10 men can complete a piece of work in 30 days how many men are requiredto complete the same job in 25 days?
77julia77 [94]
We must assume that all workmen work at the same rate, and keep it up forever.

More men ==> fewer days

so the proportion is:    30/25 = x/10

Cross-multiply the proportion:

300 = 25 x

Divide each side by 25 :

x = 300/25 = <u>12 men</u>
3 0
3 years ago
HAVE A NICE DAY <br> WILL GIVE BRAINLST :)
muminat

Answer:

1)  2 and 6 ; 4 and 8 ; 1 and 5 ; 3 and 7

2)  3 and 6 ; 4 and 5

3) 1 and 8 ; 2 and 7

7 0
3 years ago
Read 2 more answers
You would like to know whether forwards in a basketball league average the same (or different) numbers of points than the overal
Akimi4 [234]

Answer:

The critical t-value for such a test given an alpha level of 0.05 is 2.26

Step-by-step explanation:

Null hypothesis : H_0:\mu = 7.5

Alternate hypothesis :H_a:\mu \neq 7.5

Population mean = \mu = 7.5

Data : 10, 9, 6, 11, 13, 14, 9, 9, 9, and 10

Mean = \bar{x}=\frac{\text{Sum of all observations}}{\text{no. of observations}}

Mean =\frac{10+9+6+11+13+14+9+9+ 9+ 10}{10}

Mean =10

Standard deviation : \sqrt{\frac{\sum(x-\bar{x})^2}{n}}

Standard deviation :\sqrt{\frac{(10-10)^2+(9-10)^2+(6-10)^2+(11-10)^2+(13-10)^2+(14-10)^2+(9-10)^2+(9-10)^2+(9-10)^2+(10-10)^2}{10}}

Standard deviation s :2.144

t = \frac{x-\mu}{\frac{s}{\sqrt{n}}}t = \frac{10-7.5}{\frac{2.144}{\sqrt{10}}}t=3.687

Df = n-1 = 10-1 = 9

T critical =t_{(df,\alpha)}=t_(9,0.05)=2.26

T calculated > T critical

So, We failed to accept null hypothesis

Hence the critical t-value for such a test given an alpha level of 0.05 is 2.26

5 0
3 years ago
Solve liner equation for they variable <br> -6x+7=2x+10-8x-3
PilotLPTM [1.2K]

Answer:

x is infinite

Step-by-step explanation:

-6x+7=2x+10-8x-3

reduce:

-6x+7=7-6x

7-6x = 7-6x

x = x

x is infinite

3 0
2 years ago
Question in the picture
Marianna [84]
Brainliest pleeease!!!!
Ok sooooooo the line is at the y intercept at (0,-50)
And if u choose two points on the graph (solid points) likeeee…. (0,-50) and (20,-30)
Use rise/ run
Soooo u go up two units and right two units soooo 2/2!!! Simplified thats what?? Thats 1!!
And so.
Y=mx+b
Plug in a few numbers….
Y=1x-50
Aaaaand the slope is moooving up (how do I know??) because from the start which is (0,-50) it goes up. So that’s why the 1 is positive. It’d be negative if it’s going the other way.
Sorry if that made no sense but moral of the story, the answer is y=1x-50
6 0
3 years ago
Read 2 more answers
Other questions:
  • What is the percentage of 24/84
    12·1 answer
  • Sarah makes $10 an hour babysitting and $5 an hour gardening. her goal is to make $80 a week while working 12 hours. how many ho
    12·1 answer
  • Jack’s room is 20 by 25 feet. Mark draws a line directly from one corner of the room to the opposite corner of the room. How lon
    5·1 answer
  • Write an expression that represents the volume of a rectangular prism (box) with length 2003-02-02-00-00_files/i0260000.jpg, wid
    14·1 answer
  • The sum of eight times a number and fifteen is seven
    9·1 answer
  • 52 rounded to the nearest ten
    5·2 answers
  • PLEASE DO NUMBER 10 ILL GFIVE BRAIN LIEST FOR YOUR WORK
    13·1 answer
  • Question:
    7·1 answer
  • Find the measure of ABD for rectangle ABCD
    9·1 answer
  • G(x) = x4 − 4x2 + 7x − 8?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!