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kari74 [83]
3 years ago
12

RE

Mathematics
1 answer:
serg [7]3 years ago
4 0

Answer:

<h3>               d = - 4</h3>

Step-by-step explanation:

<h3> a_1=7\\a_2=3\\\\d=a_2-a_1=3-7=-4</h3>
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You complete 40% of your homework problems before dinner. what fraction of the problems did you complete before dinner?
Rzqust [24]

Answer:

40/100

Step-by-step explanation:

4 0
2 years ago
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What is the interquartile range for the data set? <br> 4 , 7, 7, 3, 5, 2, 6, 7, 9
valina [46]
Population size:9
Lower quartile (xL): 3.5
Upper quartile (xU): 7

<span>Interquartile range (xU-xL): 3.5</span>
4 0
3 years ago
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Find the perimeter and area (last question I need on my test
Lera25 [3.4K]

Step-by-step explanation:

Let AB be 5cm

AC be 13cm

According to Pyathagros therom

AC²=AB²+BC²

13²=5²+BC²

169=25+BC²

BC²=169-25

BC²=144

BC=√144

BC=12cm

Area of ∆ABC=½×base×hight

=½×12×5

=½×60

=30cm²

Parimeter of ∆ABC=a+b+c

=5+12+13

=30cm

5 0
1 year ago
A plane can fly 290 miles downwind in the same amount of time as it can travel 220 miles upwind. Find the velocity of the wind i
nikitadnepr [17]

Answer:

The speed of the wind is 35\ mph

Step-by-step explanation:

Let

x-----> the speed of the wind in mph

we know that

Downwind

(255+x)=\frac{290}{t}

t=\frac{290}{(255+x)} -----> equation A

Upwind

(255-x)=\frac{220}{t}

t=\frac{220}{(255-x)} ----> equation B

equate the equation A and the equation B

\frac{290}{(255+x)}=\frac{220}{(255-x)}\\ \\290(255-x)=220(255+x)\\ \\ 73,950-290x= 56,100x+220x\\ \\220x+290x=73,950-56,100\\ \\510x=17,850\\ \\x= 35\ mph

7 0
3 years ago
A drawing has a scale of 1:40 on the drawing a bedroom is a rectangle measuring 10 cm x 18 cm a kitchen has an actual area of 30
REY [17]

Answer:

The kitchen has a bigger actual area than the bedroom

Step-by-step explanation:

Here, we want to know the compartment with the bigger area

Since the bedroom has a drawing measure of 1 to 40; compared to the actual measurement;

The real dimensions will be;

10 * 40 and 18 * 40

= 400 by 720

So, its area which is length * width will be;

400 cm * 720 cm = 288,000 cm^2

we can see that the kitchen with an area of 300,000 cm^2 is bigger than this area of the bedroom

3 0
2 years ago
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