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IRINA_888 [86]
3 years ago
8

10 Points shown in my point board Helppppp

Mathematics
2 answers:
Daniel [21]3 years ago
7 0
The best answer is "We can expect 135 of the grandparents to spend less than 2 hours a day online" because about 54% of all people said they spend >2 hours online everyday, and 54% of 250 is 135. 

Hope this helps!
disa [49]3 years ago
5 0
Let's turn the percentages into numbers to make things easier. To find a percentage, multiply by the percentage/100, e.g. 25 percent multiply by 0.25:

250*0.54 = 135

As it happens, this is one of the answers: exactly 135 of the grandparents spend less than 2 hours online.
The principle is the same for all of the other percentages.
54% of 250 is an exact number, however if a question comes up where you get a decimal answer, that is when you would select about, for example if it solved to 135.5, you cannot have .5 of a person so the answer would be about, since either 135 or 136 individuals could have watched less than two hours (the only time this should come up in the case of people, however, is if they rounded the percentage).
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Given f(x) = -3x + 1 and g(x) = 4*, find the following combinations:
Nikitich [7]

Step-by-step explanation:

Please refer to the attachment

5 0
3 years ago
Hi, Please i need help with this question. Workings would be deeply appreciated .
kupik [55]

Answer:

k = ⅕  

Step-by-step explanation:

The slope-intercept equation for a straight line is

y = mx + b, where

m = the slope and

b = the y-intercept

Data:

(3,4)     = a point on the line

(3k,0)   = x-intercept

(0,-5k) = y-intercept

Calculations:

1. Slope

m = (y₂ - y₁)/(x₂ - x₁) = (-5k - 0)/(0 - 3k) = -5/(-3) = ⁵/₃

This makes the equation

y = ⁵/₃x - 5k

2. k

Insert the value of the known point: (3,4)

4 = (⁵/₃)(3) - 5k

4 = 5 - 5k

-1 = -5k

k = ⅕

The figure below shows your graph passing through (3,4) with intercepts 3k and -5k on the x- and y-axes respectively .

 

8 0
3 years ago
How to do linear equations 27, 28,28,30
Mekhanik [1.2K]
#27.  
First cross multiply
2 (2a-3) = 3 (a-1)
next use the distribute property on both sides
4a - 6 = 3a - 3
combine like terms, subtract 3a from both sides and add 6 to both sides
a = 3

#28
cross multiply
3x = 4, then divide both sides by 3
x = 4/3

#30
add 1/4 to both sides
3/x = 1/2 + 1/4, find a common denominator for the right side fractions
3/x = 2/4 + 1/4 = 3/4
therefore, x = 4
6 0
3 years ago
Please help!!! I’ll mark as brainliest :)
lyudmila [28]

Answer:

the third one

Step-by-step explanation:

5 0
3 years ago
A 10-ft vertical post casts a 14-inch shadow at the same time a nearby cell phone tower cast a 119-ft shadow. How tall is the ce
Yakvenalex [24]

Answer:

The cellphone towers height is 1020 ft.

Step-by-step explanation:

This question is solved using proportions, by a rule of three.

A 10-ft post casts a 14-inch shadow.

Each feet has 12 inches, which means that a post with 10 feet will cast a 14/12 = 1.167 ft shadow. How tall is the cell-phone tower with a 119-feet shadow?

10 feet post - 1.167 ft shadow

x feet tower - 119 feet shadow

Applying cross multiplication:

1.167x = 10*119

x = \frac{1190}{1.167}

x = 1020

The cellphone towers height is 1020 ft.

8 0
3 years ago
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