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
taurus [48]
3 years ago
15

Without drawing the graph of the equation, determine how many points the given equation have in common with the x-axis and where

is the vertex in relation to the x-axis?
y = -2x^2 + x + 3

Mathematics
1 answer:
Gala2k [10]3 years ago
4 0
Remark
It's asking you to complete the square to find the vertex. 

Solve
y = -2x^2 + x + 3 Put brackets around the first 2 terms.
y = (-2x^2 + x) + 3    Pull out the 2.
y = -2(x^2 - 1/2 x) + 3 Be especially observant of the sign on 1/2x Divide the middle term's number by 2 and square it. 
y = -2(x^2 - 1/2 x + [(1/2) / 2]^2 ) + 3 [1/2 divided by 2 is 1/4. (1/4)^2 = 1/16; 2*(1/16) = 1/8
y = - 2(x^2 - 1/2 x + (1/4)^2 ) + 3 + 1/8
y = -2(x - 1/4)^2 + 3 1/8

Comment
Answer to your question. The maximum value (3 1/8) is above the y axis. That means the graph of the equation crosses the x axis twice. I'm going to include the graph because in answering the question, there is no harm in seeing the graph.

You might be interested in
What is the value of the expression? 30-5×4+2
belka [17]
30-5×4+2
30-20+2
10+2=12
7 0
3 years ago
Read 2 more answers
EASY MATH PROBLEM!!!
11111nata11111 [884]
750 + 0.60(750) = 750 + 450 = 1200 <==

or this way...
750 * 1.60 = 1200
6 0
3 years ago
Read 2 more answers
If 7 people are in your family and everyone is supposed to drink 7/8ths of water each day, how much water is needed for the whol
laiz [17]

Answer: 6.125 or 6¹/₈ units of water

Step-by-step explanation:

There are 7 people in the family and each of them are mean to drink 7/8ths of water.

The amount of water all 7 should take is therefore:

= 7 * 7/8

= 49/8

= 6.125 or 6¹/₈ units of water

5 0
2 years ago
In circle A, ∠BAE ≅ ∠DAE.
kirza4 [7]

The image of circle A is missing, so i have attached it;

Answer:

x = 17

Step-by-step explanation:

In Δs EAB and EAD

We are told that;

∠BAE ≅ ∠DAE

AB = AD = AE

Now,

The Two triangles have two corresponding equal sides and the angles between them are equal, thus, we can say that the two triangles are congruent by SAS (Side Angle Side) postulate of congruence

By using the result of congruence, we can say that;

EB ≅ ED

We are given that;

EB = 3x - 24 and ED = x + 10

Thus,

3x - 24 = x + 10

∴ 3 x - 24 = x + 10

Add 24 to both sides to give;

3x = x + 34

Subtract x from both sides to give;

2x = 34

Divide both sides by 2 to give;

x = 17

5 0
3 years ago
Read 2 more answers
A consumer products company found that 44​% of successful products also received favorable results from test market​ research, w
Korolek [52]

Answer:

  1. 0.80
  2. 0.289
  3. 0.20
  4. 0.711

Step-by-step explanation:

Given:

P(S\cap F)=0.44\\P(S\cap F^{c})=0.13\\P(S^{c}\cap F^{c}) = 0.32\\P(S^{c}\cap F) = 0.11

The rule of total probability states that:

P(A) = P(A\cap B) + P(A\cap B^{c})

Compute the individual probabilities as follows:

P(S) = P(S\cap F) + P(S\cap F^{c})\\=0.44+0.13\\0.57

P(S^{c}) = 1 - P(S)\\=1-0.57\\=0.43

P(F) = P(S\cap F) + P(S^{c}\cap F)\\=0.44+0.11\\=0.55

P(F^{c})=1-P(F)\\=1-0.55\\=0.45

Conditional probability of an event A given B is:

P(A|B)=\frac{P(A\cap B)}{P(B)}

  • Compute the value of P(S|F):

         P(S|F)=\frac{P(S\cap F)}{P(F)}\\=\frac{0.44}{0.55}\\=0.80

  • Compute the value of P(S|F^{c})

        P(S|F^{c})=\frac{P(S\cap F^{c})}{P(F^{c})}\\=\frac{0.13}{0.45}\\=0.289

  • Compute the value of P(S^{c}|F)

        P(S^{c}|F)=\frac{P(S^{c}\cap F)}{P(F}\\=\frac{0.11}{0.55}\\=0.20

  • Compute the value ofP(S^{c}|F^{c})

       P(S^{c}|F^{c})=\frac{P(S^{c}\cap F^{c})}{P(F^{c})}\\=\frac{0.32}{0.45}\\=0.711

3 0
3 years ago
Other questions:
  • Represent 4/7 and 3/14 in a horizontal or vertical number line
    7·2 answers
  • One can convert temperature from Kelvin into Fahrenheit using the formula F=95(K−273)+32. What is the temperature in Kelvin corr
    10·2 answers
  • A 18 ft tall flagpole standing next to a tent costs o 27 ft shadow. If the tent casts a shadow that is 15 ft long. then how tall
    10·2 answers
  • Show your work and include correct units in answer
    14·1 answer
  • A chef makes 1 and one half gallons of soup in a large pot.how many 1-cup servings can the chef get from this large pot of soup
    6·1 answer
  • 5 1/2+7 3/4 what is it​
    13·2 answers
  • Insert space to express 725895213 in International number<br>system​
    5·1 answer
  • Which is the x-intercept of the graph of the equation y=3x–9?
    10·1 answer
  • Can someone show me how to do this???
    7·1 answer
  • A baker decorates 42 cupcakes in 30 minutes how many cupcake can the baker decorate per minutes?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!