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
malfutka [58]
3 years ago
15

Please help me with these problems

Mathematics
1 answer:
S_A_V [24]3 years ago
8 0

Answer:

1.a=2

2.  C  x=2  and x=-3

Step-by-step explanation:

The standard form for the quadratic function is  

ax^2 +bx+c

so  we need to rewrite the function to be in this form

2x^2 -10 = 7x

Subtract 7x from each side

2x^2 -7x-10 = 7x-7x

2x^2 -7x-10 = 0

a =2, b= -7  c=-10


2.  The quadratic formula is

-b ± sqrt(b^2 -4ac)

----------------------------

2a


2x^2 + 2x=12

Lest get the equation in proper form

2x^2 + 2x-12 = 12-12

2x^2 +2x-12 =0

a=2  b=2 c=-12

Lets substitute what we know

-2 ± sqrt(2^2 -4(2)(-12))

----------------------------

2(2)

-2 ± sqrt(4+96)

----------------------------

2(2)

-2 ± sqrt(100)

----------------------------

4

-2 ± 10

----------------------------

4

-2 + 10               -2-10

-----------   and  --------------

4                             4

8/4   and -12/4

2  and -3

You might be interested in
24
Vaselesa [24]

Answer:

1.5/2

Step-by-step explanation:

slope formula = y2-y1/ x2 - x1

point one (2,0)

point 2 (0, 1.5)

you dont really need to subtract anything because the intercepts, so the slope is 1.5/2

(slope or m = 1.5 - 0 / 2 - 0 )

x intercept = value of x when y is 0

y intercept = value of y when x is 0

3 0
2 years ago
A change in heat energy can lead to a change in phase of or state of matter
ziro4ka [17]

Answer:

true

Step-by-step explanation:

if an object is losing heat energy, it turns cold, and can turn into a solid, for example, water turning into ice. If you apply heat on ice, it's turns back to water. IF you apply heat to water, it vaporizes, and turns into gas.

3 0
3 years ago
Read 2 more answers
0.25 r – 0.125 + 0.5 r = 0.5 + r . Solve for r.
kotykmax [81]
0.25r - 0.125 + 0.5r = 0.5 + r

0.75r - 0.125 = 0.5 + r    |add 0.125 to both sides

0.75r = 0.625 + r      |subtract r from both sides

-0.25r = 0.625    |divide both sides by (-0.25)

r = - 2.5
6 0
3 years ago
What is the measure of ∠x?
mario62 [17]

Answer:

I'm guessing you are asking the measure of the angle WXY the answer will be 132

Step-by-step explanation:

Straight lines are 180 degrees and the other angle is 48 minus the 180 degrees is 132

3 0
3 years ago
Read 2 more answers
Identify the coefficient(s), constants, and number of terms for the following expression:<br> 4x^2-5
FromTheMoon [43]
Coefficient is 4
Constant is 5
There is 2 terms
Hope this helped!
8 0
2 years ago
Other questions:
  • Approximately how many inches are in 6 meters? A) 72 inches B) 144 inches C) 216 inches D) 234 inches
    6·1 answer
  • How many numbers less than 1000 are divisible by 7?
    5·1 answer
  • Fractions, Decimals, and Percents
    12·2 answers
  • Roberto estimated that the capacity of an elevator was 10 people. The actual capacity of the elevator is 14 people. Which expres
    14·2 answers
  • The average income, I, in dollars, of a lawyer with an age of x years is modeled with the following function: What is the younge
    5·1 answer
  • This Is My Last Question And I'm Giving 20 Points
    15·1 answer
  • Who is really good with math? I need serious help i am failing math
    12·1 answer
  • Helpppppp how plssss!!!​
    13·1 answer
  • Pentagon ABCDE and pentagon A"B"C"D"E" are shown on the coordinate plane below:
    14·1 answer
  • The distance of a trip
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!