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
pantera1 [17]
3 years ago
7

Please help me, its due today!!!

Mathematics
1 answer:
Virty [35]3 years ago
7 0

Answer:

D: 11

Step-by-step explanation:

When I evaluated the expression, I got 11.

Hope it helps! :D

You might be interested in
Suppose a population has a mean of 7 for some characteristic of interest and a standard deviation of 9.6. A sample is drawn from
valkas [14]

Answer:  A. 1.2

Step-by-step explanation:

Given : Sample size : n= 64

Standard deviation: \sigma=9.6

The formula to find the standard error of mean is given by :-

S.E.=\dfrac{\sigma}{\sqrt{n}}\\\\\Rightarrow\ S.E.=\dfrac{9.6}{\sqrt{64}}\\\\\Rightarrow\ S.E.=\dfrac{9.6}{8}=1.2

Therefore, the standard error of the​ mean= 1.2

Hence, A is the right option.

7 0
3 years ago
Only number one please help ​
Alex73 [517]

Answer:

C) 75 + 50x = 25 + 70x

Step-by-step explanation:

ABC Tech:

$50 an hour. So,for x hours= 50 * x = 50x

Service charge = 75 + 50x

Tech Squad:

$70 an hour. So,for x hours= 70 * x = 70x

Service charge = 25 + 70x

C) 75 + 50x = 25 + 70x

50x - 70x = 25 - 75

-20x = -50

x = -50/-20

x =5/2 = 2\frac{1}{2}hours

6 0
3 years ago
Pleaseee help me with number eight,, I don’t know how to do it at all
mamaluj [8]

Answer: Im not too good at math but I will try to help and I will say 70 is the answer...?

Im really sorry if I get this wrong

7 0
3 years ago
Read 2 more answers
What is the value of y?<br> у<br> 60°<br> 80°
Marina86 [1]

Answer: 40

Step-by-step explanation:

The angles form a straight angle, so y = 180 - 80 - 60 = 40.

4 0
2 years ago
Evaluate the expression and write your answer in the form a + bi. 1) (2-6i)+(4+2i)2) (6+5i)(9-2i)3) 2/(3-9i)4) (3 − 5i)(7 − 2i)
laiz [17]

Answer:

Step-by-step explanation:

Given the following complex numbers, we are to expressed them in the form of a+bi where a is the real part and b is the imaginary part of the complex number.

1) (2-6i)+(4+2i)

open the parenthesis

= 2-6i+4+2i

collect like terms

= 2+4-6i+2i

= 6-4i

2)  (6+5i)(9-2i)

= 6(9)-6(2i)+9(5i)-5i(2i)

= 54-12i+45i-10i²

= 54+33i-10i²

In complex number i² = -1

= 54+33i-10(-1)

= 54+33i+10

= 54+10+33i

= 64+33i

3) For the complex number 2/(3-9i), we will rationalize by multiplying by the conjugate of the denominator i.e 3+9i

= 2/3-9i*3+9i/3+9i

=2(3+9i)/(3-9i)(3+9i)

= 6+18i/9-27i+27i-81i²

= 6+18i/9-81(-1)

= 6+18i/9+81

= 6+18i/90

= 6/90 + 18i/90

= 1/15+1/5 i

4) For (3 − 5i)(7 − 2i)

open the parenthesis

= 3(7)-3(2i)-7(5i)-5i(-2i)

= 21-6i-35i+10i²

= 21-6i-35i+10(-1)

= 21-41i-10

= 11-41i

4 0
3 years ago
Other questions:
  • Can someone please help me with this sorry to ask again
    10·1 answer
  • Jordan's salary is $1250 a month plus a 5% commission on all his sales. what must the amount of his sales be to earn at least $1
    8·1 answer
  • What is the axis of symmetry for f(x)=32+9x+15 ?
    7·1 answer
  • Please help me yall
    15·1 answer
  • Explore equivalent ratios by using the slider. Complete the sentences below. For every __ apples, there are 6 oranges.
    10·1 answer
  • Please help!! I will make you brainlest.
    7·2 answers
  • Customers can pick their own apples at well orchards. They pay $6 to enter the orchard and $2 per pound for the apples they pick
    7·1 answer
  • I need help with my math
    9·1 answer
  • Given the following exponential function, identify whether the change represents growth or decay, and determine the percentage r
    15·1 answer
  • If two noncollinear segments in the coordinate plane have slope 3, what can you conclude?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!