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kaheart [24]
4 years ago
12

Evaluate the following expression: -(-7 + 3)

Mathematics
2 answers:
AlexFokin [52]4 years ago
6 0
You just change the sign of each value so - 7 becomes 7 and +3 becomes - 3 so the answer is

+7-3
= 7-3
=4
bulgar [2K]4 years ago
4 0
Here, It would be: - (-7 + 3)
= 7 - 3 = 4

In short, Your Answer would be 4

Hope this helps!
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Is 83,391,946 divisible by 4?<br><br> YE or NO<br><br> HELP ME PLZ<br><br> T^T
Vanyuwa [196]

Answer:

No

Step-by-step explanation:

Reason for this is because when you  divide 4 into 83,391,946 it ends up as 20847986.5 and since the number has to be whole its not divisible

4 0
3 years ago
27.2g / 2.0 cm^3<br><br><br>and<br><br><br>(2.04 x 10^-4) x (2.34 x 10^-3)
sineoko [7]

Answer:

the first one is 3.4

Step-by-step explanation:

how this helps

3 0
3 years ago
He price of an item has been reduced by 15%. The original price was $35.
Liono4ka [1.6K]
15% of $35 is 5.25. 35- 5.25 = $29.75
7 0
3 years ago
collect data (in decibels) of 10 different things in term of loudness. Arrange the data in ascending order &amp; find mean, medi
ss7ja [257]
Whisper-20dB
Quiet Residence-30dB
Soft stereo in Residence-40dB
Average Speech-60dB
Cafeteria-80dB
Pneumatic Jackhammer-90dB
Loud crowd noise-100dB
Accelerating Bike-100dB
Rock concert-120dB
Jet Engine (75 ft away)-140dB

(1)Mode=100dB (since 100 is occurring the maximum no. of times, i.e. it has the highest frequency of 2)
(2)Mean=sum of observations/Total number of observations
=(20+30+40+60+80+90+100+100+120+140)/10
=770/10=10dB
(3)Median= 1/2[{n/2}th observation + {(n/2)+1}th observation], where, n=total no. of observations
So, 1/2[{10/2}th observation + {(10/2)+1}th observation]
=1/2[5th observation+6th observation]
=1/2[80+90]                    [Because:5th observation=80dB and 6th=90dB]
=1/2(170)
=85
Therefore, median=85dB

6 0
4 years ago
Find a set of scalar parametric equations for the line formed by the two intersecting planes. 3x+3y+2z+2=0 2x−3y+2z−2=0
vivado [14]

The normal vectors to the two planes are (3, 3, 2) and (2, -3, 2). The cross product of these will be the direction vector of the line of intersection, (12, -2, -15).

Using x=0, we can find a point on this line by solving the simultaneous equations that remain:

... 3y +2z = -2

... -3y +2z = 2

Adding these, we get

... 4z = 0

... z = 0

so the point we're looking for is (x, y, z) = (0, -2/3, 0). This gives rise to the parametric equations ...

  • x = 12t
  • y = -2/3 -2t
  • z = -15t

By letting t=2/3, we can find a point on the line that has integer coefficients. That will be (x, y, z) = (8, -2, -10).

Then our parametric equations can be written as

  • x = 8 +12t
  • y = -2 -2t
  • z = -10 -15t
8 0
3 years ago
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