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
Pachacha [2.7K]
3 years ago
15

I used a calculator and have solved it without. I didn't get any of these answers. HELP

Mathematics
1 answer:
Andreas93 [3]3 years ago
6 0

Answer:

-9 + 7√5.

Step-by-step explanation:

(3 - √5)(2 + 3√5)

= 3(2 + 3√5) - √5(2 + 3√5))

= 6 + 9√5 - 2√5 - 15

= -9 + 7√5.

You might be interested in
Graphs which present the values on the horizontal axis and the number of times this occurs on the vertical axis are known as wha
Ivanshal [37]

Answer:

The horizontal axis represents TIME

Step-by-step explanation:

In a time-series plot, the horizontal axis represents time, and the vertical axis represents the value of the variable we are measuring. -The values of the variable are plotted at each of the times, then the points are connected with straight lines.

3 0
3 years ago
You buy a bicycle helmet for $22.26, which includes 6% sales tax. The helmet is discounted 30% off the selling price. What is th
Firdavs [7]
If you paid $22.26 after the discount and tax then 30% is 0.30 and 30% OFF is 1-0.30=0.70
Tax is 6% or 0.06 and along with the initial is 1+0.06=1.06 so P is original price in P×0.70×1.06=22.26
P×0.742=22.26
P=$30 was the original price
5 0
3 years ago
Suppose that the salaries, in thousands of dollars, of the managers for a industry are normally distributed with an unknown mean
Marrrta [24]

Answer: t _(α/2) = 2.060

Step-by-step explanation:

Given that;

sample size n = 26

confidence interval = 95%

level of significance α = ( 1 - 95/100 ) = 0.05

but from the question the salaries (26) are use to estimate the mean of the population so, its a two tail test

therefore our level if significance α will be divided by 2 = 0.05/2 = 0.025

now our degree of freedom df = 26 - 1 = 25

FROM standard t-table value

the critical value of t for the level of significance 0.025

and 25 degree of freedom is 2.060

therefore, t _(α/2) = 2.060

6 0
3 years ago
10% more than 10 is __?
Anna11 [10]

Answer: 11

Step-by-step explanation:

10/100 = 0.1

10 * 0.1 = 1

1 + 10 = 11

7 0
3 years ago
Read 2 more answers
Subtract 8 1/5 - 4 2/5 . Simplify the answer and write as a mixed number.
earnstyle [38]

Answer:

3\frac{4}{5}

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which of these would not produce a representative sample that determines the favorite food
    13·2 answers
  • Inverse function of 1.30(1.46)^t
    14·1 answer
  • 3.Point P lies on the directed line segment from A (2,3) to B(8,0) and partitions the segment in the ratio 2 to 1.
    5·1 answer
  • What is the expanded form of 24.76?
    15·2 answers
  • 10 pts help me out!<br> Its kinda simple
    11·1 answer
  • I need help on number 2 please help me. Thanks. Happy holidays
    7·1 answer
  • Expand this expression and combine like terms 1/3(x-9)
    11·2 answers
  • Solve for b. 3a + 2b = c
    11·2 answers
  • In the U.S., 51% of all births are boys, and 49% are girls. Use the binomial model to find the probability that 6 out of 10 birt
    9·1 answer
  • Late one afternoon, while being chased by the Sheriff of Nottingham into an unfamiliar part of Sherwood forest, Robin Hood and L
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!