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
3241004551 [841]
2 years ago
7

I am confused on this quadratic problem.

Mathematics
1 answer:
hodyreva [135]2 years ago
5 0

Answer:

(x+5)^2=81 would be correct

Step-by-step explanation:

solution (if you want it)

x² + 10x + 25 = 81

x² + 10x - 56 = 0

(x + 14)(x - 4) = 0

x = 4, x = -14

You might be interested in
The top and bottom margins of a poster are each 15 cm and the side margins are each 10 cm. If the area of printed material on th
12345 [234]

Answer:

the dimension of the poster = 90 cm length and 60 cm  width i.e 90 cm by 60 cm.

Step-by-step explanation:

From the given question.

Let p be the length of the of the printed material

Let q be the width of the of the printed material

Therefore pq = 2400 cm ²

q = \dfrac{2400 \ cm^2}{p}

To find the dimensions of the poster; we have:

the length of the poster to be p+30 and the width to be \dfrac{2400 \ cm^2}{p} + 20

The area of the printed material can now be:  A = (p+30)(\dfrac{2400 }{p} + 20)

=2400 +20 p +\dfrac{72000}{p}+600

Let differentiate with respect to p; we have

\dfrac{dA}{dp}= 20 - \dfrac{72000}{p^3}

Also;

\dfrac{d^2A}{dp^2}= \dfrac{144000}{p^3}

For the smallest area \dfrac{dA}{dp }=0

20 - \dfrac{72000}{p^2}=0

p^2 = \dfrac{72000}{20}

p² = 3600

p =√3600

p = 60

Since p = 60 ; replace p = 60 in the expression  q = \dfrac{2400 \ cm^2}{p}   to solve for q;

q = \dfrac{2400 \ cm^2}{p}

q = \dfrac{2400 \ cm^2}{60}

q = 40

Thus; the printed material has the length of 60 cm and the width of 40cm

the length of the poster = p+30 = 60 +30 = 90 cm

the width of the poster = \dfrac{2400 \ cm^2}{p} + 20 = \dfrac{2400 \ cm^2}{60} + 20  = 40 + 20 = 60

Hence; the dimension of the poster = 90 cm length and 60 cm  width i.e 90 cm by 60 cm.

4 0
3 years ago
Please help marking people as BRAINLIST
romanna [79]
I believe the answer is 8
3 0
2 years ago
ILL BRAINLIEST YOU PLEASE HELP ME
-Dominant- [34]

Answer:

x = 7/\sqrt{2} or 4.949747468

Step-by-step explanation:

45-45-90 triangles have a specific pattern.

The smaller sides are x, & the hypotenuse is x*\sqrt{2}

With this knowledge, we know we have to divide the hypotenuse by \sqrt{2} to get the smaller sides, so we divide 7 by the \sqrt{2} to find x.

4 0
3 years ago
A game involves spining this spinner. what is the probality that the pointer will land on g?
Doss [256]
There's a 1 in 7 chance it will land on G.
6 0
3 years ago
Read 2 more answers
the probability that it will rain tomorrow is 0.85what is the probability that it will not rain tomorrow​
bija089 [108]

Answer:

.15

Step-by-step explanation:

Probability of Rain = x

Probabiliy of No Rain = y

Y=1-X

Y=1-0.85

Y=.15

4 0
2 years ago
Other questions:
  • 5k-3(2k-2/3)-9=0. Solve the equation
    9·1 answer
  • The graph of y=x^3 is transformed as shown in the graph below. Which equation represents the transformed function?
    8·2 answers
  • We paid $40 for 8 Hamburgers how much would we pay for 24 hamburgers
    12·2 answers
  • If 6 newborn babies are randomly selected, how many different gender sequences are possible?
    9·1 answer
  • Solve the equation. Type just the numeral answer. Do NOT round your solution.
    14·2 answers
  • Find the discriminant.<br> - 4y^2- 8y + 2 = 0
    7·1 answer
  • Is it 6, 9, 18, or 8?
    7·1 answer
  • How do you simplify algebraic expressions
    9·1 answer
  • I never was taught how to solve this
    15·1 answer
  • Answerrrrr plzzzzzzzzzzzzzzzzzzzz
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!