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
Amanda [17]
3 years ago
13

Solve x2 − 7x = −13.

Mathematics
1 answer:
Ket [755]3 years ago
6 0

Answer:

\frac{7+\sqrt{-3} }{2} \\\\\frac{7-\sqrt{-3} }{2}

Step-by-step explanation:

<u>Step 1:  Use the Quadratic formula to solve</u>

<u />x^2 - 7x = -13

x^2 -7x+13 = -13 +13

x^2-7x+13=0\\

\frac{-b+\sqrt{b^2-4ac} }{2a} \\\frac{-b-\sqrt{b^2-4ac} }{2a}

\frac{-(-7)+\sqrt{(-7)^2-4(1)(13)} }{2(1)} \\\frac{-(-7)-\sqrt{(-7)^2-4(1)(13)} }{2(1)}

\frac{7+\sqrt{49-52} }{2} \\\\\frac{7-\sqrt{49-52} }{2}

Answer:  \frac{7+\sqrt{-3} }{2} \\\\\frac{7-\sqrt{-3} }{2}

You might be interested in
Sharon’s turtle escaped from her backyard sometime in the last few hours. According to her calculations, the farthest the turtle
laila [671]

Turtle can go in any direction farthest  to 4 block

hence Maximum Distance can be + 4 or - 4

Block representing farthest distance is x

Distance of block  x from 112  would be

x  - 112  

x  - 112    = ± 4

Taking mod both sides

=> | x - 112 | = |  ± 4 |

=> | x - 112 | = 4

| x - 112 | = 4  is the equation which can be used to find the block numbers that represent the farthest distance that the turtle may be

Brainliest?

6 0
2 years ago
PLZ help!!
nlexa [21]

Answer:

Step-by-step explanation:

Devin is making a candle by pouring melted wax into a mold in the shape of a square pyramid.

Each side of the base of the pyramid is 9 cm and the height of the pyramid is 10 cm (as shown in figure below)

also, To get the wax for the candle, Devin melts cubes of wax that are each 4 cm by 4 cm by 4 cm

We have to find the number of wax cubes will Devin need in order to make the candle.

Consider Wax cubes of dimension 4 cm by 4 cm by 4 cm

Volume of cube =  (side)³

Thus, Volume of one wax cube is given by = (side)³

Volume of one wax cube  = (4)³= 64 cm³

Now we find the volume of square pyramid.

Volume of square pyramid =

Thus,Volume of given square base with base side 9 cm and height 10 cm is

Area of square = (side)²

Volume of square pyramid =

Volume of square pyramid =

Volume of square pyramid =

thus, the volume of square pyramid is 270 cm³

(approx)

Thus, the number of wax cubes required is 4.21. Rounding it off to the nearest whole number, we will get 5.

Thus,the number of wax cubes required is 5.

7 0
3 years ago
Alex bikes 2 3/4 miles. Then, she runs 1 2/4 miles. The distance she bikes is how many times the distance she runs?
Svet_ta [14]

Answer:

1.83 times

Step-by-step explanation:

Take the distance biked divided by the distance run.

2 3/4 / 1.5 = 1.83 times.

This means that Alex biked 1.83 times more than the distance she ran.

If this answer is correct, please make me Brainliest!

4 0
3 years ago
How many seashells did Jennifer give to her younger brother
Kitty [74]

Answer:

I need a picture

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Is this the right answer?
Ne4ueva [31]
Yes your answer is solved correctly
6 0
2 years ago
Other questions:
  • 4. How else can the ratio 4/5 be written?<br> O A.4:5<br> O B.5:4<br> O C.54<br> O D..2
    11·1 answer
  • Can someone help me with this I don't understand.
    5·1 answer
  • V-100 = ? + ?i NEED HELP
    8·1 answer
  • Prove that the bisectors of alternate interior angles are equal
    11·1 answer
  • 2p – 6 = 8 + 5(p + 9)
    14·1 answer
  • When Dylan checks their school lunch account, the
    10·1 answer
  • I need help on 1-7 some one please help me
    14·1 answer
  • Please help me!!!!!!!
    5·1 answer
  • All 136 students in the Math Club went on a field trip. Some students rode in vans which hold 8
    15·1 answer
  • Consider the given system of linear equations. 2x+y-z=8 x+4y+z=7 -3x+2y-3z=21
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!