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Aleksandr-060686 [28]
3 years ago
7

Knowing that sin 30° = 1/2 , what is a?

Mathematics
2 answers:
sergeinik [125]3 years ago
5 0

Answer:

Answer: B (14)

Step-by-step explanation:

Think- what is 7 half of? 7x2 = 14. Therefore, 14 will be your answer

umka2103 [35]3 years ago
3 0

Answer: D

Step-by-step explanation:

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Greg is trying to solve a puzzle where he has to figure out two numbers, x and y. Three less than two-third of x is greater than
Fittoniya [83]
Inequation 1: 

\frac{2}{3}x-3 \geq y

to plot the pairs (x, y) for which the inequation holds, draw the line y=\frac{2}{3}x-3

then pick a point in either side of the line. If that point is a solution of the inequation, than color that region of the line, if that point is not a solution, then color the other part of the line.

we do the same for the second inequation. Then the solution, is the region of the x-y axes colored in both cases.

inequation 2: 

y+ \frac{2}{3}x\ \textless \ 4

y\ \textless \ - \frac{2}{3} x+ 4



draw the lines 

i)  y=\frac{2}{3}x-3          use points (0, -3),  (3, -1)

ii)y=- \frac{2}{3} x+ 4       use points ( 0, 4),   (3, 2)


let's use the point P(3, 3) to see what region of the lines need to be coloured:

\frac{2}{3}x-3 \geq y  ; 
\frac{2}{3}(3)-3 \geq 3
2-3 \geq 3, not true so we color the region not containing this point


y+ \frac{2}{3}x\ \textless \ 4
(3)+ \frac{2}{3}(3)\ \textless \ 4
3+ 5\ \textless \ 4 not true, so we color the region not containing the point (3, 3)

The graph representing the system of inequalities is the region colored both red and blue, with the blue line not dashed, and the red line dashed.



4 0
3 years ago
For EACH ordered pair, determine if its a solution to 2x+9y=13
vladimir1956 [14]
The answer is (2,1). 2*2=4 and 9*1=9. 9+4=13
8 0
3 years ago
Please help me with this
zhannawk [14.2K]
I’m pretty sure it’s 82
6 0
2 years ago
Someone please help me! I’ll give brainliest
Katarina [22]

Answer:

D

Step-by-step explanation:

3 0
3 years ago
What is the difference between a frequency polygon and an​ ogive?
HACTEHA [7]

Answer:

Step-by-step explanation:

The main difference between an ogive and a frequency polygon is - An ogive is a plot of cumulative values while a frequency polygon is a plot of the values themselves. An ogive is also called the cumulative frequency graph. It is a curve which shows the cumulative frequency of a given set of data.

6 0
3 years ago
Read 2 more answers
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