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
solniwko [45]
3 years ago
15

What are the x-intercepts of y=2x^2+6x-20?

Mathematics
2 answers:
goldfiish [28.3K]3 years ago
8 0

Answer:

The x-intercepts would be (2, 0) and (-5, 0).

Step-by-step explanation:

To find the x-intercepts, substitute in 0 for y and solve for x.

0 = 2x^2 + 6x - 20.

Solve the equation.

x = 2, -5.

NISA [10]3 years ago
7 0

Answer:

the x-intercepts are -5 and 2

Step-by-step explanation:

y=2x^2+6x-20

x-intercept is when y is set equal to zero

So, y = 0

0 = 2x^2+6x-20

2x^3+6x-20 = 0\\Taking \ 2 \ common\\2(x^2+3x-10) = 0\\Dividing \ both \ sides \ by \ 2\\x^2+3x-10 = 0\\Using \ mid\ term \ break \ formula\\x^2+5x-2x-10 = 0\\x(x+5)-2(x+5)=0\\Taking \ (x+5) \ common\\(x+5)(x-2) = 0

Either,

x+5 = 0    <u><em> OR </em></u>    x-2 = 0

x = -5       <u><em> OR  </em></u>     x = 2

So, the x-intercepts are -5 and 2

You might be interested in
Scores on an exam are normally distributed with a mean of 76 and a standard deviation of 10. In a group of 230 tests, how many s
Tanzania [10]
The score of 96 is 2 standard deviations above the mean score. Using the empirical rule for a normal distribution, the probability of a score above 96 is 0.0235.
Therefore the number of students scoring above 96 is given by:
230\times 0.0235=5\ students
5 0
3 years ago
Read 2 more answers
Rebecca had 9/10 of a yard of ribbon.Rebecca had 9/10 of a yard of ribbon. Then she gave 7/20 of a yard to a friend. How much do
scZoUnD [109]
I think it's 11/20.
6 0
3 years ago
Use the given information to find the unknown value:y varies directly as the square of z. When x = 2, then y= 20. Find y when 2
Vladimir79 [104]

Answer

y = 45 when x = 3

Step-by-step explanation:

\begin{gathered} \text{Given that y varies directly as the square of x} \\ \text{This implies that there is a positive relationship betwe}en\text{ y and the square of z} \\ \text{Mathematically, this can be expressed as} \\ y\text{ }\propto x^2 \\ To\text{ turn this expression into an equation, we n}eed\text{ to introduce a proportionality constant k} \\ y=kx^2 \\ \text{ According to the question, y = 20 and x = 2} \\ \text{From the above informaion we can find our k} \\ y=kx^2 \\ 20\text{ = k }\cdot2^2 \\ 20\text{ = k }\cdot\text{ 4} \\ \text{Divide both sides by 4} \\ \frac{20}{4}\text{ = }\frac{k\cdot\text{ 4}}{4} \\ k\text{ = 5} \\ \text{ Find y when }x\text{ = 3} \\ y=kx^2 \\ y\text{ = 5 }\cdot(3)^2 \\ y\text{ = 5 }\cdot\text{ 9} \\ y\text{ = 45} \end{gathered}

8 0
1 year ago
8. Use the data below to answer the following question. Population 60 million Number in the labor force 50 million Number employ
vlabodo [156]

Answer:

4%

Step-by-step explanation:

The unemployment rate is calculated by dividing the number of unemployed(2 million) by the labor force (50million) and multiplying the result by 100.

Labor force is the total number of unemployed and employed persons in a country. In this case, we have:

Labor force= No. of unemployed (in million) + No. of full time employed (in million) + No. of part time employed (in million) = 2 + 38 + 10 = 50 million

Unemployment rate= 2/50 × 100 = 4%

Therefore, the rate of unemployment is 4%.

7 0
3 years ago
In a recent year there were about 400,000,000 mobile internet users. That same year, there were about 1.2 x 10^9 desktop interne
Naddika [18.5K]

Answer:

The number of desktop internet users are 3 times more than the number of mobile internet users.

Step-by-step explanation:

We are given the following in the question:

Number of mobile internet users = 400,000,000

400,000,000 = 4\times 10^{8}

Number of desktop internet user =

1.2 \times 10^9

Comparison of values:

=\dfrac{\text{Number of desktop internet user}}{\text{Number of mobile interet user}}\\\\=\dfrac{1.2\times 10^9}{4\times 10^8}\\\\=0.3\times 10\\=3

Thus, the number of desktop internet users are 3 times more than the number of mobile internet users.

4 0
3 years ago
Other questions:
  • An integer x is divided by an integer y, and quotient is 24.the sum of these two integers is 75. what is the value of x?
    6·1 answer
  • Please help!!!!! <br> Which defines the piecewise function shown?
    11·2 answers
  • Write a numerical expression for the calculation.
    8·1 answer
  • What’s the value of (-1/2) -4
    10·1 answer
  • Factor the expression.
    11·1 answer
  • Write an equation in slope-intercept form of the line that passes through the given point and is parallel to the graph of the gi
    12·1 answer
  • If first to get right gets brainly
    12·2 answers
  • The population of a town,
    11·1 answer
  • Please help me, I feel so idiotic right now
    11·1 answer
  • which function is best represented by this graph?A) f(x) = -3x² + 2x + 1 B) f(x) = 3x² + 2x - 4C) f(x) = x² + x - 4D) f(x) = x²
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!