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makkiz [27]
3 years ago
15

How many solutions does this system have?​

Mathematics
2 answers:
Andrew [12]3 years ago
8 0

That system has D. no solutions

faust18 [17]3 years ago
4 0

Answer: no solution

Step-by-step explanation:

Solve by substitution

Divide each term by 2 and simplify.

Replace all occurrences of y with the solution found by solving the last equation for y. In this case, the value substituted is 5x+1.

Solve for x in the second equation.

Since −1≠3, there are no solutions.

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What single decimal multiplier would you use to increase by 9% followed by 3% decrease
MaRussiya [10]

Answer:

= 94

Step-by-step explanation:

To work out the multiplier, first add or subtract the percentage from 100, then convert to a decimal. Example: we want to add 20% to £110. To work out the multiplier, add 20 to 100, to get 120, and then change it to a decimal (divide by 100) to get 1.2. The answer is £110 x 1.2 = £132.

so to workout an increase of 9% followed by 3% we would do:

9% - 3% = 6%. convert = 0.06 = 100-6 = 94 converted into 0.94 x 100 = 94

7 0
3 years ago
-10a×4b+20a^2b+4ab-6ab​
Vinvika [58]

Step-by-step explanation:

-10a×4b+20a^2b-2ab

-40ab+20a^2b-2ab

-42ab+20a^2b Answer

I'm not sure...

8 0
3 years ago
What will be the unit digit of the cube of a number ending with 9 ?
Bess [88]

Answer:

9

Step-by-step explanation:

If I’m understanding you correctly, the answer would be nine.  Any number with a 9 in the one’s place (unit digit) would still have a nine in that place after being cubed.

29³=24,389

69³=328,509

3 0
3 years ago
Read 2 more answers
The volume of a sphere is 972 PI ft3. What is the radius of the sphere? Use the formula V = 4/3 PI r3 to find your answer. Enter
Kryger [21]
972=4/3πr^3
729=πr^3
232.16~ r^3
r~ 6 feet, so the radius is about 6 feet. Hope it help!
7 0
3 years ago
Read 2 more answers
8. You are paid a commission plus $5.40 per hour with time and a half overtime
Elanso [62]

9514 1404 393

Answer:

  $491.65

Step-by-step explanation:

The pay for the first 8 hours is $5.40 per hour × 8 hours = $43.20. Hours over 8 are paid at 1.5 × $5.40 = $8.10 per hour. There are at least 8 hours every day for the 6-day week. There are hours over 8 on Monday, Wednesday, Thursday, and Friday totaling 7 hours of overtime.

The amount of sales is more than $3000, so 4% will be paid on $3000, and 5% will be paid on the $1115 in excess of $3000.

So, the gross pay is ...

  $43.20 × 6 + 8.10 × 7 = $315.90 . . . . wages

  $3000 × .04 +1115 × .05 = $175.75 . . . commission

  $315.90 +1.75.75 = $491.65 . . . . gross pay for the week

_____

It can be less tedious to let a spreadsheet do the calculations.

6 0
3 years ago
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