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Evgesh-ka [11]
3 years ago
8

Which of the following expressions is equivalent to a(4-a)-5(a+7)

Mathematics
2 answers:
MissTica3 years ago
5 0

Answer:

-a² - a - 35

Step-by-step explanation:

a(4 - a) - 5(a + 7)

(4a - a²) - (5a + 35)

4a - a² - 5a - 35

-a² - a - 35

Licemer1 [7]3 years ago
4 0

Answer:

dude give answer choices


Step-by-step explanation:


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Find the particular solution of the differential equation that satisfies the initial condition f'(x) 4x, f(0) = 5 f(x) =
malfutka [58]

Answer: f(x)=2x^2+5

Step-by-step explanation:

First integrate f'(x) so we can find the funtion f(x):

4\int\limits {x} \, dx =4[\frac{1}{2} x^2]=2x^2+C=f(x)

The initial conditions say that when x = 0, the function equals 5. Let's write that down:

f(0)=5=2(0^2)+C=C

Therefore, the integration constant 'C' must equal 5. This means that our function is:

f(x)=2x^2+5

6 0
2 years ago
what is the slope of a line is PARALLEL to the line with this equation y=<img src="https://tex.z-dn.net/?f=y%20%3D%20%20%5Cfrac%
Gwar [14]

Our line equation is

y=\frac{1}{2}x+7

where the slope m=1/2 and the y-intercept b is b=7.

Parallel lines has the same slope. Hence, their slope is always

m=\frac{1}{2}

in this case.

6 0
1 year ago
What is the median of the lengths of Kate's workout
Alik [6]
Arranging them in ascending order :
21 , 21 , 30 , 44,  49,  52


Median = (30 + 44) ÷ 2
Median = 37 mins

------------------------------------------------------------------
Answer: Median = 37 mins (Answer D)
------------------------------------------------------------------

4 0
3 years ago
Since the Boston marathon began in 1897, the finish time has been incrementally decreasing. The mean finish time to date is 231
morpeh [17]

Answer:

hello your question lacks the required options but i will provide a general answer to your question

answer : The mean value  and the standard deviation would allow us use a Z-score

Step-by-step explanation:

mean value = 231 minutes

standard deviation ( std ) = 40 minutes

sample size = 40

The parameters that would be applicable while use Z-score are : The given mean value and the standard deviation

This is because the value of a z-score gives us an information on how far we are from the mean score i.e. number of standard deviations

+Zscore means that the score  is above the average value

-Zscore means that the score is below the average value

7 0
3 years ago
6.<br> Simplify the expression.<br> (-3)-4
Leto [7]

Answer:

-7

Step-by-step explanation:

  1. Re-write: -3 - 4
  2. -3 - 4 = -7

I hope this helps!

8 0
3 years ago
Read 2 more answers
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