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romanna [79]
3 years ago
9

How do you solve this without substituting 2a+b=-5 -5a+b=16

Mathematics
1 answer:
Hoochie [10]3 years ago
8 0

Answer:

answer shown in picture above

Step-by-step explanation:

you need to multiply them so that you can simplify it. the bottom b will become negative and the b's will x out

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If 5% of an amount equals 800,000, then what is that amount? Please I confused, can someone help me!
kondor19780726 [428]

Answer:

the amount is 16,000,000

Step-by-step explanation:

first let that amount be Y for an example. so...

\frac{5}{100}*Y=800,000

\frac{5Y}{100}=800,000

5Y=800,000*100

5Y=80,000,000  (then you both divide by 5 in both sides so that Y is left alone.)

So      Y=16,000,000

so the amount you are looking for is 16,000,000

7 0
3 years ago
Please help me with number #3 and check if the others are correct please I really need help
Sveta_85 [38]
All I can say is 1 and 2 are correct.
6 0
2 years ago
Can someone please help me fill in the answer in the bottom.​
Julli [10]

Answer:

Step-by-step explanation:

1) Initial water level = 30 feet

2) Rate of change = (30 - 25) / (0 - 1) = 5/(-1) = -5

5ft  per hour

3) y-intercept = 30

6 0
2 years ago
Read 2 more answers
BRAINLIEST WILL I GIVE HURRY
stepladder [879]

Answer:

{10,8}

Step-by-step explanation:

-3x + 4y = -62

4x + 5y = 0

let's eliminate the x

-3x + 4y = -62 | x -4 |

4x + 5y = 0 | x 3 |

12x - 16y = 248

12x + 15y = 0

-------------------- -

-31y = 248

y = 248/(-31) = 8

since you must do this proble with elimination, we cant use subtitution. so we repeat the way once more to find x (eliminate y)

-3x + 4y = -62 | x 5 |

4x + 5y = 0 | x 4 |

-15x + 20y = -310

16x + 20y = 0

-------------------- -

-31x = -310

x = -310/-31 = 10

4 0
3 years ago
Y intersepts examples
Inga [223]

Answer:

3x+4y-12=0

y intercept = -constant term/coefficient. of y

= 12/4

=3

8 0
3 years ago
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