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
How many parts are there in the format of a two-column proof?
iogann1982 [59]
There is 6 parts in a two column format.
4 0
2 years ago
Read 2 more answers
A hot air balloon rises 9 meters every 3 seconds. A blimp rises 5 meters every two seconds. Which will take the shortest time to
malfutka [58]

Answer:

A) Hot air balloon about 17 seconds

Step-by-step explanation:

9 x 6 = 54      6 x 3= 18 seconds

5 x 10 = 50      10 x 2= 20 seconds

3 0
2 years ago
Read 2 more answers
Smallest to largest 7/12 1/2 2/3 4/10 1/6
hodyreva [135]
The order is 1/6, 4/19, 1/2, 7/12, 7/12, and 2/3.
5 0
3 years ago
What is y+x find the answer
Zigmanuir [339]

What is y+x?


Answer:

<span>= <span>x+<span>y</span></span></span>

3 0
3 years ago
Read 2 more answers
Which of the following numbers would have 10^3 in its scientific notation?
Monica [59]

Answer:

D. 9,700

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • a manufacturer can produce a color pen at a cost of $3. the color pens have been selling for $5 per pen and at this price, consu
    15·1 answer
  • Mike has 9 lollipops, 6 peanut butter cups and 3 pieces of chocolate. If he divides the candy equally into 3 bags, how many piec
    14·2 answers
  • Raheem found a worm that was 9 centimeters long what is the length of the worm in in millimeters? Just answer the question in nu
    10·1 answer
  • Find the unit rate Lisa walked 48 blocks in 3 hours how many blocks per hour
    15·1 answer
  • In preparation for a graduation party, Christine bought peaches, oranges, and bananas. Peaches cost $1.50 each, oranges cost $1.
    11·1 answer
  • What is double of 90?
    11·2 answers
  • Which of the following pairs of numbers has a GCF of 1?
    6·2 answers
  • If a surface area of the Earth is about 196,9000,000 square miles, about how many square miles are covered in water
    8·1 answer
  • A unit of measure used in surveying is the link; 1 link is about 8 inches. about how many links are there in 9 feet.
    6·1 answer
  • A trapezoid has an area of 18 square miles. The bases are 5 miles and 7 miles. Using these measurements, the height of this trap
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!