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Jobisdone [24]
3 years ago
14

X-y-2z=4 -x+2y+z=1 -x+y-3z=11

Mathematics
1 answer:
juin [17]3 years ago
6 0

Answer:

look at the picture above

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A music store owner noted that CD sales had dropped 12% from one quarter to the next. If the owner sold 460 units in the first q
BabaBlast [244]

Answer:

404.8

Step-by-step explanation:

100%=460

12%=x

x=(12*460)/100

x=55.2

Answer=460-x

7 0
3 years ago
Which expression has a greater value, 3/8 x 5:6 or 3/8 divided by 5/6? Explain
Lubov Fominskaja [6]

Answer:

3/8 divided by 5/6

Step-by-step explanation:

To divide a fraction by a fraction, you multiply the first fraction by the reciprocal (aka the fraction flipped upside down, in this case the reciprocal of 5/6 is 6/5). Since 6/5 is greater than 5/6, 3/8 divided by 5/6 is greater than 3/8 times 5/6.

6 0
3 years ago
Read 2 more answers
Please help me. Please dont answer if you dont know. i will give brainliest. thankyou, have a great day! :)
docker41 [41]

Answer:

1. 3,077.2 cm³

2. 1,808.6 ft³

3. 602.9 in.³

4. 230.8 yd³

5. 191.8 m³

6. 70.3 in.³

Step-by-step explanation:

Recall: Volume of cylinder = πr²h

1. r = 7 cm

h = 20 cm

π = 3.14

Volume = 3.14*7²*20 = 3,077.2 cm³

2. r = 8 ft

h = 9 ft

π = 3.14

Volume = 3.14*8²*9 ≈ 1,808.6 ft³

3. r = ½(8) = 4 in.

h = 12 in.

π = 3.14

Volume = 3.14*4²*12 ≈ 602.9 in.³

4. r = 3½ yd = 3.5 yd

h = 6 yd

π = 3.14

Volume = 3.14*3.5²*6 ≈ 230.8 yd³

5. r = ½(5.3) = 2.65 m

h = 8.7 m

π = 3.14

Volume = 3.14*2.65²*8.7 ≈ 191.8 m³

6. r = 1.9 in.

h = 6.2 in.

π = 3.14

Volume = 3.14*1.9²*6.2 ≈ 70.3 in.³

4 0
3 years ago
An ion has a charge of +7. How far is it from being neutral?
jeka57 [31]

We are given that

An ion has a charge of +7

and a neutral has charge always 0

so, change is charge = ion charge - neutral change

so, we can plug values

change is charge = +7 -0

change is charge = 7

so, option-C..................Answer


8 0
4 years ago
Mr. ford drove 483 miles during his trip. How many hundreds are in this number ?
frez [133]
There are 4 hundreds
6 0
3 years ago
Read 2 more answers
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