4 years ago

Y=-3x+2x, 3x+y=1 solve using substitution

Mathematics

1 answer:

VARVARA [1.3K]4 years ago

8 0

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Which fraction is more 1/3 3/8 or 4/6

Sophie [7]

Answer:

think the answer is 4/6

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3 years ago

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HELP FIND THE UNIT RATE OF 90 DAYS/20 TRIPS PLEASEEEEE

iris [78.8K]

Answer:

The unit rate is 4.5 days per trip

Step-by-step explanation:

So the equation would be 90 divided by 20

Simplified it is the same thing as 9 divided by 2

90 divided by 20 is 4.5

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3 years ago

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The equation

ra1l [238]

<h2>Explanation:</h2>

Let's use a trial and improvement method to find this solution.

Step 1. Let's choose x = 8.5

Substituting into the equation:

$(8.5)^2+ 3(8.5) - 94=0? \\ \\ 72.25+25.5-94=0? \\ \\ 3.75\neq 0$

Step 2. Let's choose x = 8.4

Substituting into the equation:

$(8.4)^2+ 3(8.4) - 94=0? \\ \\ 70.56+25.2-94=0? \\ \\ 1.76\neq 0$

Step 3. Let's choose x = 8.3

Substituting into the equation:

$(8.3)^2+ 3(8.3) - 94=0? \\ \\ 68.89+24.9-94=0? \\ \\ -0.21\neq 0$

Since the sign of the equation changes from positive to negative when evaluating from 8.4 to 8.3, then x = 8.3 seems to be a reasonable value. Finally, the solution to 1 decimal place is:

$x=8.3$

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3 years ago

Solve the system of linear equations. <br>- 3x + 5y = 13 <br> x + 4y = -10

Molodets [167]

Answer:

(-6,-1)

Step-by-step explanation:

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3 years ago

5. The number −6 is 2 more than an unknown number. Find the unknown number.

Mariana [72]

Answer:

-4

Step-by-step explanation:

-6 - 2 = -4

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3 years ago