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zlopas [31]
3 years ago
6

Sixteen students have cell phones. Five of the cell phones have touch screens. Out of 144 students' cell phones how many would y

ou expect to have tounch screens?
Mathematics
2 answers:
rodikova [14]3 years ago
5 0
5:16 = ratio of touch screen cell phones to students.
Times both by 9(144 / 16) = 45
You would expect 45 students to have cell phones.

Hope this helps.
olga nikolaevna [1]3 years ago
5 0
You would expect at least 45 students to have touch screen phones.
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Fern knitted 20 scarves over 5 nights. After 8 nights of knitting, how many scarves would fern have made in total.
Studentka2010 [4]

Answer:

Fern will knit 32 scarves in 8 nights.

Step-by-step explanation:

Number of scarves knitted by Fern in 5 night = 20

Relation between number of scarves knitted and number of nights is proportional,

Therefore, Number of scarves knitted (s) ∝ Number of nights spent to knit the scarves (n)

s ∝ n

s = kn

k = \frac{s}{n}

Here, k = proportionality constant

For s = 20 and n = 5,

k = \frac{20}{5}

k = 4 scarves per night

For 8 nights, by using the same proportionality rule,

k = \frac{s}{8}

4 = \frac{s}{8}

s = 32 scarves

Therefore, Fern will knit 32 scarves in 8 nights.

4 0
3 years ago
Which shows the correct substitution of the values a, b, and c from the equation –2 = –x + x² – 4 into the quadratic formula?
Romashka [77]
-2 = - x + x^2  -4 => x^2 - x - 4 + 2 = 0

x^2 - x - 2 = 0

a is the coefficient of x^2 => a = 1

b is the coefficient of x => b = - 1

c is the constant term => c = - 2

quadratic equation: [- b +/- √(b^2 - 4ac) ] / 2a =

= { 1 +/- √[ (-1)^2 - 4(1)(-2)] } / (2(1) = { 1 +/- √ (1 + 8) } / 2 = {1 +/- √9} / 2 =

= { 1 +/- 3} / 2
4 0
3 years ago
Please please please help me out
Murrr4er [49]

Answer:

what grade you in do you even do your work this easy is b

8 0
3 years ago
Read 2 more answers
If f(3) = 24, what is f-1 (24)?
True [87]

Answer:

f=25

Step-by-step explanation:

24+1=25

25-1=24

5 0
2 years ago
Determine if its possible to form a triangle using the set of segments with the given measurement. explain please! 12 m, 5 m, 18
IRINA_888 [86]

Adding together the shorter two sides results in 17 m.  If these two sides were laid end to end, the sum of their sides (17 m) would be less than the length of the third side.  Thus, NO triangle could be constructed with this set of line segments.

6 0
3 years ago
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