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
lozanna [386]
3 years ago
12

Find the value of a and b if √5-1/√5+1=a+b√5

Mathematics
1 answer:
timurjin [86]3 years ago
4 0

Answer:3/2-(√5)/2

Step-by-step explanation:

You might be interested in
The length of a rectangle is 6m longer than its width. If the perimeter of the rectangle is 52m, find its area
sveticcg [70]
If length is x, then width is 6+x 
<span>Perimeter = 2*(x + 6+x) = 52 </span>
<span>2*6 + 2*2x = 52 </span>
<span>4x = 52 - 12 = 40 </span>
<span>x = 40/4 = 10 </span>

<span>Area = length*width = 10*(6+10) </span>
<span>Area = 10*16 = 160 meter square</span>
4 0
3 years ago
Ind the roots of 3(x – 2)2 = 12.
blagie [28]

Answer:

x=4

Step-by-step explanation:

If you plug this in, you get 3(4-2)2=12. Simplify to 3 times 2 times 2, which equals 12. Stay Safe and Have a Magnificent Day!!!!!!;):)

6 0
2 years ago
A pharmacist has an 18% alcohol solution and a 40% alcohol solution. How much of each should he mix together to make 10 liters o
ladessa [460]
X = amount of the 18% solution

y = amount of the 40% solution

we know the 18% solution has only 18% of alcohol, the rest is maybe water or something, now, how many liters is 18%?  well, 18% of anything is just (18/100) * anything, so, 18% of x is just (18/100) *x or 0.18x, and that's how many liters are there.

likewise, how many liters are there in the 40% solution?  well, (40/100) * y, or 0.4y, that many.

we know the mixture has to yield 10 liters at 20% alcohol, how many liters of only alcohol is that?  well, (20/100) * 10, or 2 liters.

\bf \begin{array}{lccclll}&#10;&\stackrel{liters}{amount}&\stackrel{alcohol~\%}{quantity}&\stackrel{liters}{alcohol}\\&#10;&------&------&------\\&#10;\textit{18\% solution}&x&0.18&0.18x\\&#10;\textit{40\% solution}&y&0.40&0.4y\\&#10;------&------&------&------\\&#10;mixture&10&0.20&2&#10;\end{array}

\bf \begin{cases}&#10;x+y=10\implies \boxed{y}=10-x\\&#10;0.18x+0.4y=2\\&#10;----------\\&#10;0.18x+0.4\left( \boxed{10-x} \right)=2&#10;\end{cases}&#10;\\\\\\&#10;0.18x-0.4x+4=2\implies -0.22x=-2&#10;\\\\\\&#10;x=\cfrac{-2}{-0.22}\implies x=\cfrac{100}{11}\implies x=9\frac{1}{11}

how much of the 40% solution?  well y = 10 - x
3 0
3 years ago
Use the arc length formula and the given information to find r. s = 12 cm, 0 = 360; r = ?
hjlf
use s=r0

but first convert 360 degree to radian
you will get 6.284 radian

then you substitute and get the answer!

12= r (6.284)
r= 1.91 cm
8 0
2 years ago
I NEED THESE ANSWERS ASAP If you can't answer some of them that is fine
fredd [130]
Hope this helped you :)

7 0
3 years ago
Other questions:
  • Find the percent using the percent equation.<br> 238 cartons is what percent of 68 ​cartons?
    7·1 answer
  • Which choice shows the best estimate of the product 0.52×695?
    5·1 answer
  • Lisa and Daisy work at a hair salon. The salon charges $18 for a hair styling session with Lisa and $12 for a session with Daisy
    9·1 answer
  • The tables represent two linear functions in a system.
    12·1 answer
  • Find the GCF of 16a and 40ab
    13·1 answer
  • What is the formula for finding the height of a sphere? No links. Thanks in advance.​
    12·2 answers
  • Write the appropriate term in each box to create an expression<br> equivalent to 7x + 2x + 6y
    11·1 answer
  • -. A new streaming company charges a rate of $5.99 per month. In order to generate some additional
    14·1 answer
  • Factor the following Polynomial a) 6x - 18​
    13·2 answers
  • Jenny received a $30.50 gift card for a photo center. She used it to buy prints that cost 20 cents each. The remaining balance,
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!