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trapecia [35]
2 years ago
8

4. (i) Solve the equation 2x2 – 7x + 4 = 0, giving

Mathematics
1 answer:
Colt1911 [192]2 years ago
6 0

????????????????????????????Step-by-step explanation:

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Solve each inequality <br><br> x+1&gt;-5(7-2x)
Natalka [10]

x+1 > -5(7-2x)\ \ \ \ |\text{use distributive property}\\\\x+1 > (-5)(7)+(-5)(-2x)\\\\x+1 > -35+10x\ \ \ \ |-1\\\\x > -36+10x\ \ \ \ |-10x\\\\-9x > -36\ \ \ \ |\text{change the signs}\\\\9x < 36\ \ \ \ |:9\\\\\boxed{x < 9}\to x\in(-\infty,\ 9)

3 0
2 years ago
explain how you can use a box-and-whisker plot to find the range of a data set. a. the range is the difference of the values of
Advocard [28]
C. The range is the difference of the value of the whiskers.
Remember: the range is the highest value subtract the lowest value.
4 0
3 years ago
HELP!!!!
OverLord2011 [107]

Answer:

Step-by-step explanation:

You just need the distance formula here.  It's very simple to follow:

d=\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2    }

which, for us, looks like this:

d=\sqrt{(13-4)^2+(19-7)^2} and

d=\sqrt{9^2+12^2} and

d=\sqrt{81+144} and

d=\sqrt{225} so

d = 15

4 0
3 years ago
What percent of 19.5 is 70.59?
NeX [460]
70.59 is 363.846154% of 19.5.
4 0
3 years ago
Read 2 more answers
Plese helpme I have problems in 4 ,5 I need find the missing side.
Allisa [31]
#4) From the reference angle of 58° we can see that we have the side opposite to that angle as well as the hypotenuse. Recall that sin=opp/hyp so we are going to use sine to find that side
sin(58°) = \frac{x}{19}        (multiply both sides by 19 to isolate x)
19 sin(58°) = x      (plug into calculator)
16.1 = x
#5) From the reference angle of 56°, we see that we have the adjacent and the opposite sides. Remember that tan=opp/adj so we will use tangent to find x
tan(56°) = \frac{12}{x}        (multiply both sides by \frac{1}{12})
\frac{tan(56)}{12} =  \frac{1}{x}          (flip them so x is on the top)
[tex] \frac{12}{tan(56)} = x
8.1 = x

8 0
3 years ago
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