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Darina [25.2K]
3 years ago
12

11.(4 pts) Given: A = 6x - x2 + 4x +8 and B= 2x3+x-5 Find a) A+B b) A-B

Mathematics
1 answer:
vivado [14]3 years ago
3 0

Answer:

a. 2x3-x2+11x+3

b.-2x3-x2+9x+13

Step-by-step explanation:

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A coat originally cost $130. Now it is on sale for 60% of its original cost. What is the sale price of the coat?
babunello [35]

Answer:

$78

Step-by-step explanation:

to find 60% of 130 multiply 130 by 0.6

this gives you 78 dollars

5 0
3 years ago
Problem 1.(32 points) A random sample of 100 Uber rides in Chicago has on average 5.4miles per ride. Assume the distribution of
marshall27 [118]

Answer:

a) CI = ( 5,1 ; 5,7 )

b) SE =  0,1  

Step-by-step explanation:

a) Sample random     n  = 100

Mean  =  μ = 5,4

Standard deviation   s = 1,3

CI = 99 %    α = 1 %   α = 0,01     α/2 =  0,005

z(c) for  0,005 is from z-table    z(c)  = 2,575

z(c)  =  ( X - μ ) /s/√n          CI  =  μ ± z(c) * s/√n

CI =  5,4 ± 2,575* 1,3/10

CI = 5,4 ± 0,334

CI = ( 5,1 ; 5,7 )

b) SE = Standard deviation / √n

SE = 1,3 /10       SE =  0,1  

We can support that with 99 % of probability our random variable will be in the CI.

6 0
2 years ago
Can someone help me plzz
andriy [413]
In an equilateral triangle (all sides and anges are equal)
angles are 60 degrees each
6 0
3 years ago
How to cross multiple 3/5 by 10
Vika [28.1K]

Here is you're answer:

In order to cross multiply you have to multiply the numerator and denominator of the first fraction by the bottom number of the second fraction and see if the equation is still true:

  • \frac{3}{5} \times 10
  • \frac{3}{5} \times \frac{10}{1}
  • 3 \times 1 = 5 \times 10
  • Solve if you like:
  • 3 \times 1 = 3
  • 5 \times 10 = 50
  • = \frac{4}{50}

Therefore you're answer is "3 × 1 = 5 × 10."

Hope this helps!

4 0
3 years ago
What is the solution to the equation √8x=√4+2x?
dolphi86 [110]

Answer:

0.3333333333333...........

7 0
3 years ago
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