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3 years ago

Simplify: (2-2x5-5)-4

Mathematics

1 answer:

Pavlova-9 [17]3 years ago

7 0

Answer:

(2*5^2)+4/3^2-5

(2*25)+4/3^2-5

50+4/3^2-5

50+1.7-5

46.7

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What is the solution to the system of equations below?

borishaifa [10]

Answer:

no solution

Step-by-step explanation:

it cannot be solved in my view

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3 years ago

A university has 29,670 students. In a random sample of 255 students, 17 speak three or more languages. Predict the number of st

nikdorinn [45]

I am sorry but it is just an example !

Question ) A university has 30,330 students. In a random sample of 270 students, 18 speak three or more languages. Predict the number of students at the university who speak three or more languages.

Answer ) 2,022 students will speak three or more languages

Here's why:
Using proportions.
18. x
--- =. ----
270. 30,330

Cross multiply
18 x 30,330 = 545,940
270 multiply x = 270x
545,940 divided by 270 = 2,022
x = 2,022 students

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3 years ago

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Musya8 [376]

You ask her to show you how to do it over and over

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3 years ago

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2(4 – 2r) = -2(r + 5) How do you know if it's identity or no solution and show work

lesantik [10]

Answer: r = 9

Step-by-step explanation:

2(4 - 2r) = -2(r + 5)

8 - 4r = -2r - 10 distributed

8 = 2r - 10 added 4r to both sides

18 = 2r added 10 to both sides

9 = r divided both sides by 2

***********************************************************************************

Identity is when you end up with a TRUE statement after moving the x-values to one side of the equation.

For example: 2x + 2 = 2(x + 1)

2x + 2 = 2x + 2 distributed

2 = 2 subtracted 2x from both sides

TRUE so x is all real numbers

No Solution is when you end up with a FALSE statement after moving the x-values to one side of the equation.

For example: 2x + 1 = 2(x + 1)

2x + 1 = 2x + 2 distributed

1 = 2 subtracted 2x from both sides

FALSE so there are no solutions

5 0

4 years ago

Please help with 1 question thank you.

frosja888 [35]

Let's replace the first, second, third, and home with letters.
first base = F
second base = S
Third base = T
home base = H
We have two triangles, ΔHTS and ΔHFS
We know HS = HS because it's a shared side.
We know FS = TS
We know that ∠HST and ∠HSF are equal.
Because of SAS, the two triangles are congruent.

According to CPCTC, TH must be congruent to FH.
Thus, the distance from home plate to third base and the distance from home plate to first base must be the same.

Have an awesome day! :)

7 0

4 years ago