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
garri49 [273]
4 years ago
11

The equation x2 – 1x – 90 = 0 has solutions {a, b}. What is a + b?

Mathematics
2 answers:
marshall27 [118]4 years ago
8 0
Hello,

It must be well know that
x²-(a+b)x+a*b=0 is a equation of 2nd degree with a and b like root.
===>a+b=1
and a*b=-90

N'en déplaise Excellency. (think before delete!)
hram777 [196]4 years ago
5 0

Answer:

1

Step-by-step explanation:

You might be interested in
You buy a car for 1000 every year it loses 40% of its value
VladimirAG [237]

Answer:

\displaystyle V_n=V_o\left(0.60\right)^n

<em>The car is worth 360 after two years</em>

Step-by-step explanation:

<u>Model For Depretiation</u>

Assume the situation of something that has an initial value Vo and loses its value by a x% every year. The first year it will lose

\displaystyle \frac{xV_o}{100}

and it will have a new value of

\displaystyle V_1=V_o-x\frac{V_o}{100}=V_o\left(\frac{100-x}{100}\right)

Next year it will have a value of

\displaystyle V_2=V_o\left(\frac{100-x}{100}\right)^2

Since x=40%, we can deduct the general formula

\displaystyle V_n=V_o\left(0.60\right)^n

For n=2

\displaystyle V_2=1000\left(0.60\right)^2

V_2=360

7 0
3 years ago
Write a linear equation that is paralel to the equation below and passes through the point (16,-2). 7x+8y = -40 .
joja [24]

Answer: 384 pounds

Step-by-step explanation:

Becuse if their are 8 eggs and each weights 48 ounces then multiply 8 times 48 to get 384 ounces/pounds

4 0
3 years ago
Find the least number that must be added to 1400 so as to get a perfect squre. full explanation​
Dmitriy789 [7]

Answer:

so what is the next perfect square after 1400?  That's what they are asking.. so I used my calculator to find it..

Step-by-step explanation:

the square root of 1400= 37.41..... but since we want a perfect square.. take 38 squared.. which is  1444 so now we know.. to add 44 to 1400 .... that's your answer  44

5 0
3 years ago
Read 2 more answers
If a cross section of the paperweight is cut diagonal to the base, which shape describes the cross section?
Firlakuza [10]
Smskkskwiiw where w Jew w us we
4 0
3 years ago
Jada raised 60% of $20 goal. How much did she raise?
natima [27]

Answer:

$12

Step-by-step explanation:

setting up a proportion and putting 20 of 100 and 60 over x, we multiply 60 and 20 then divide one hundred from both sides leabing. We should have 100/x = 1200/100. Doing this gives us x = 12.

4 0
3 years ago
Read 2 more answers
Other questions:
  • 3x+5y=15 solve for y
    5·1 answer
  • Can you please find the number that replaces the ? please? This is the sequence: 1 5 6 11 ? 28 I would be so thankful if you cou
    6·1 answer
  • What is a derivative
    10·1 answer
  • A circle with radius 3 has a sector with a central
    6·2 answers
  • PLEASE HELP WILL MARK BRAINLY !!!
    11·1 answer
  • Math question please help if you get this right I will mark you as a brainliest
    14·1 answer
  • The Eagles basketball team scored 12 more than 2 times as many points in the last game of the season than in the first game. Whi
    6·1 answer
  • What is the answer to <br> 16Sin40
    9·1 answer
  • 4 cm<br> 8.5 cm<br> What’s the area ?
    8·1 answer
  • Identify the kind of sample that is described.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!