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Andre45 [30]
4 years ago
5

0.30+0.31+0.32+0.33+...0.49+0.50

Mathematics
1 answer:
Fiesta28 [93]4 years ago
8 0
You can use gauss's method

n(first number + last number)/2 where n is the number of integers in this case 21 ()

21(0.30 + 0.50)/2

21*0.8/2

21*0.4

8.4
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Plleeaassee help it is URGENT MAATHH HELP PLEASE WILL GIVE 5 STARS ON ALL CORRECT ANSWERS, MARK AS BEST ANSWER AND SAY THANKS
lara [203]
Using Pythagoras in the first question
c=\sqrt{16 ^{2} + 4^{2} } =16.4924
which is approximately 16.5
for the second question
we also use Pythagoras
b^2=c^2-a^2
\sqrt{13^{2}-12^2}=5


4 0
3 years ago
Help its iready ill give brainiest
madam [21]

Answer:

7(1/2)

Step-by-step explanation:

7 0
4 years ago
I need this ASAP!!<br> Please show work as well, TY SO MUCH!!
shtirl [24]

Answer:

Step-by-step explanation:

19.

a) to find thhe x- intercept we make y=0

x² +4x -5 = 0

(x+5)(x-1) =0

x+5=0 so x=- 5

x-1 =0 so x= 1

b)

y-intercept is at (0, -5)

c)

axis of symmetry is at

x=-b/2a =-4/2*1 = -2

x= -2

d)

vertex is at (-2, -9) because x coordinate is on the axis of symmetry at -2 and

y= x² +4x -5= (-2) ² +4(-2)  -5 = 4-8-5 = 4-13 = -9

4 0
3 years ago
The interior angles formed by the sides of a quadrilateral have measures that sum to 360°.
dangina [55]
2x + 2x + 124 + 124 = 360
4x + 248 = 360
2x = 360 - 248 = 112
x = 112/2 = 56
5 0
3 years ago
Read 2 more answers
Perform the indicated operation. Be sure the answer is reduced.
ANTONII [103]

\frac{m}{n} . \frac{n}{p}  \div  \frac{p}{q}  \\  =  \frac{m}{p}  \div  \frac{p}{q}  \\  =  \frac{m}{p} . \frac{q}{p}  \\  =  \frac{mq}{ {p}^{2} }

Hope it helps...

Regards;

Leukonov/Olegion.

8 0
3 years ago
Read 2 more answers
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