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3 years ago

Given the function f(x) = 2x-5/3, which of the below expression is correct?

Mathematics

2 answers:

VMariaS [17]3 years ago

5 0

I think you’re subtracting 5. So now it’s f^-1(x)= 3x+5/2. Not too sure but hope this may help. So, C.

Mazyrski [523]3 years ago

3 0

answer under the link: http: //briskrange.com/7gAl

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You are selling concessions at a local swim meet. Hot dogs are being sold for $1.00 and soda is being sold for $0.50. At the end

melomori [17]

Answer:

use this equation: 150=1x+0.5y

Step-by-step explanation:

a) standard form equation above

b) 150=1x+0.5y

subtract 1x from both sides

then divide all by 0.5 to get slope intercept form

c) plug it in: 150=1(40)+0.5y and solve to get 220

d) take the y intercept from answer b. and the y intercept shows how many you have to sell of each to reach you $150(I think, this part might be wrong...idk)

5 0

3 years ago

I REALLY NEED HELP!!! this is graded and plzzzz no links!!!!!

lara31 [8.8K]

8 x 6 = 48 (regularly you’d divide by two but this is on both sides so we’ll leave it)
4 x 10 = 40 / 2 = 20
6 x 4 = 24 / 2 = 12
8 x 4 = 32 / 2 = 16
48 + 20 + 12 + 16 = 96
hope that helps! message me with any questions on other problems.

6 0

3 years ago

I'm painting my house lavender. I'm going to use a mix

DanielleElmas [232]

Let $W=4x, B=3x, R=2x$ .

The ratio

$4x+3x+2x=189 \\ 9x=189 \\ x=21\implies W=84,B=63,R=42$

Hope this helps.

8 0

3 years ago

Find the sample standard deviation and the population standard deviation of the data set. 56, 65, 73, 66, 64, 58, 72, 52, 69, 71

Fittoniya [83]

Answer:

population standard deviation = √58.79857 = 7.6680

sample standard deviation = √63.32154 = 7.9575

Step-by-step explanation:

The question is on sample standard deviation and population standard deviation

Arrange data in ascending order

56, 65, 73, 66, 64, 58, 72, 52, 69, 71, 53, 66, 78, 58

52,53,56,58,58,64,65,66,66,69,71,72,73,78

Find the mean of the data set;

$(52+53+56+58+58+64+65+66+66+69+71+72+73+78) /14$

= $\frac{901}{14} = 64.36$

Finding the deviations from the mean

Deviations square of deviations

52-64.36= -12.36 152.77

53-64.36= -11.36 129.05

56-64.36= -8.36 69.89

58-64.36= -6.36 40.45

64-64.36= -0.36 0.13

65-64.36= 0.64 0.41

66-64.36= 1.64 2.67

69-64.36= 4.64 21.53

71-64.36=6.64 44.09

72-64.36=7.64 58.37

73-64.36=8.64 74.65

78-64.36=13.64 186.05

Sum  823.18 

1. Treating the data set as an entire population;

population variance= 823.18/14 =58.79857

population standard deviation = √58.79857 = 7.6680

2. Treating the data set as a sample, the number of data points will be less by 1

n= 14-1 = 13

sample variance= 823.18/13 = 63.32154

sample standard deviation = √63.32154 = 7.9575

4 0

3 years ago

What’s -2(7n-6)+n=-3-8n

natali 33 [55]

-2(7n-6)+n=-3-8n

multiply the bracket by -2

-2(7n)-2(-6)+n= -3-8n

-14n+12+n= -3-8n

-14n+n+12= -3-8n

-13n+12= -3-8n

Move -8n to the other side. Sign changes from -8n to 8n.

-13n+8n+12= -3-8n+8n

-5n+12= -3

move +12 to the other side

sign changes from +12 to -12

-5n+12-12= -3-12

-5n= -15

Divide by -5

-5n/-5= -15/-5

n= 3

Answer : n= 3

7 0

3 years ago

Read 2 more answers