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Gemiola [76]
3 years ago
13

Perform the indicated operation. 3/a - 5 + a + 2/a =

Mathematics
1 answer:
Wewaii [24]3 years ago
6 0
It would equal 5/a-5+a
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Previous studies on sleep tendencies report that, on average, an adult American will sleep for 6 hours each night with a standar
Rasek [7]

Answer:

b) One sample z-test for means

Step-by-step explanation:

Normal Distribution

we have μ₀ (population mean from previous studies)

sample size    n  =  100

standar deviation of population   σ  = 0.75

And it was determined from sample, that μ = 5 : so we want to know if, at some significance level that value (which is smaller than population mean ) could help in relation to decide about rejecting hypothesis  H₀

We should use a z one tail-test for means (left tail)

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3 years ago
Help please will mark!! Melissa the trainer has two solo workout plans that she offers her clients: Plan A and Plan B. Each clie
ioda

Answer:

3

clients who did Plan A and

2

who did Plan B. On Tuesday there were

8

clients who did Plan A and

4

who did Plan B. Linda trained her Monday clients for a total of

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hours and her Tuesday clients for a total of

9

hours.

Step-by-step explanation:

let x equal the number of hours for each plan A workout.

let y equal the number of hours for each plan B workout.

on monday, there were 3 clients who did plan A workout and 2 clients who did plan B workout for a total of 4 hours.

the formula for monday becomes 3x + 2y = 4

on tuesday, there were 8 clients who did plan A workout and 4 clients who did plan B workout for a total of 9 hours.

the formula for tuesday becomes 8x + 4y = 9

you have to solve these 2 equations simultaneously.

they are:

3x + 2y = 4

8x + 4y = 9

multiply both sides of the first equation by 2 and leave the second equation as is to get:

6x + 4y = 8

8x + 4y = 9

7 0
3 years ago
A rectangle has four sides so we double each side and add them to each other:
il63 [147K]

Answer: this many 4

Step-by-step explanation:

2(2x+7)+2(3x+8y)

=4x+14+6x+16y

=10x+16y+14

5 0
3 years ago
Which system of equations can be graphed to find the soultion(s) to x^2=2x+3
Elanso [62]

Answer:

\left \{ {{y=x^2} \atop {y=2x+3}} \right.

Step-by-step explanation:

The system would be:

\left \{ {{y=x^2} \atop {y=2x+3}} \right.

And I attached the graph. The system will have 2 solution (The 2 intercepts between the curves)

3 0
4 years ago
-2(x - 2) = -3 - 21 I need help with that question, I've been trying to solve it for hours but i cant find the answer ​
iVinArrow [24]

Answer:

x = 14

Step-by-step explanation:

you would first distribute the -2 with x - 2, which should give you -2x + 4, and you want to do the -3 - 21, which would give you -24, then subtract 4 from -2x + 4, then you should have -2x = -28, then divide it by -2, which should give you x = 14

3 0
3 years ago
Read 2 more answers
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