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3 years ago

Indicate whether the following question is a statistical question. Explain why or why not.

Mathematics

1 answer:

Dimas [21]3 years ago

8 0

It’s a question because there is not value of time.

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1. Calculati! ( Va rog ajutati-ma! )

Ksju [112]

1. 7+ (-9) = 7-9=-2
2.(-8) + (+5)= -8+5= -(8-5)=-3
3.(+9) - (-3) = 9+3=12
4.(+12) - (-1) = 12+1=13
5. (-7) - (-5) = -7+5==(7-5)=-2
(-14) - (+2) = -14-2=-(14+2)=-16

8 0

3 years ago

Given D = 5, E = 10 and F = 4, evaluate D• E/F 1/2 2 25/2

marshall27 [118]

Answer:

25/2

Step-by-step explanation:

D = 5, E = 10 and F = 4,

D• E/F

5 * 10/4

Multiply and Divide from left to right

50/4

25/2

4 0

3 years ago

Simplify the expression(a4−6a2b2+ b4)−(−2a4+5a2b2+ 3b4) and hence, find its value for a = 2and b = −1.

ELEN [110]

Answer:

(a) $3a^4 - 11a^2b^2 -2b^4$

(b) $3a^4 - 11a^2b^2 -2b^4= 2$

Step-by-step explanation:

Given

$(a^4 - 6a^2b^2+ b^4) - (-2a^4+5a^2b^2+ 3b^4)$

Solving (a): Simplify

$(a^4 - 6a^2b^2+ b^4) - (-2a^4+5a^2b^2+ 3b^4)$

Open brackets

$a^4 - 6a^2b^2+ b^4 +2a^4-5a^2b^2- 3b^4$

Collect Like Terms

$a^4 +2a^4- 6a^2b^2-5a^2b^2+ b^4 - 3b^4$

Simplify Like Terms

$3a^4 - 11a^2b^2 -2b^4$

Solving (b): Simplify when a = 2 and b = -1

$3a^4 - 11a^2b^2 -2b^4$

$3*(2)^4 - 11*(2^2)*(-1)^2 -2*(-1)^4$

$3 * 16 - 11 * 4 * 1 - 2 * 1$

$48 - 44 - 2$

$= 2$

Hence:

$3a^4 - 11a^2b^2 -2b^4= 2$

4 0

2 years ago

20 POINTS, answer pls ty fill out the missing angle measures until you find x

Basile [38]

Answer:

x is 101 degrees.

Step-by-step explanation:

sorry my handwritings so bad it's hard to draw through my computer.

hope this helps!

have a great day :-)

6 0

2 years ago

In a bag of keys, there are 12 silver keys, 5 black keys, 11 copper keys, and 2 painted keys of various colors. One key is drawn

umka2103 [35]

The total number of keys equals:
12 + 5 + 11 + 2 = 30 keys

The probability to pick a sliver key is:
12/30 = 2/5

The probability to pick a copper key is:
11/30

Hope that helps

7 0

3 years ago