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satela [25.4K]
3 years ago
6

Linear combination 3x+2y=-4 4x-y=13 Please give a step by step explanation

Mathematics
1 answer:
Ostrovityanka [42]3 years ago
8 0

when you have a linear combination for example 3x + 2y equals negative 4 you adieu like terms and then multiply

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Find principal of a loan at 11% for 5 years with $426.25 simple interest
Ahat [919]

Answer:

P=775

Step-by-step explanation:

The Simple Interest Equation is A = P(1 + rt)

where

A = Total Accrued Amount (principal + interest)

P = Principal Amount

I = Interest Amount

t = Time Period involved in months or years

In this case, we do not know the values ​​of the equation (A and P), but we know the amount of interest accrued

If we define our principal whit this formula, we are able to know the rest of the values:

A-P= interest

clearing

A=interest+P

replacing

426.25 + P = P (1+(0.11(5))

Solving

426.25+P=1.55P

P-1.55P=-426.25

-0.55P=-426.65

P=\frac{-426.25}{-0.55}

P=775

7 0
3 years ago
Evaluate the expression: 2/5 x 0.6
astra-53 [7]
I believe the answer would be 6/25 simplified. 12/50 would be the original answer
5 0
4 years ago
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What is the median of this data? 43, 28, 39, 19, 24, 47, 31, 20, 37
kotegsom [21]
32 Just add all the numbers up and divide by how many numbers there are (9).
7 0
3 years ago
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A student is 7 years old. If you triple the teachers age and add the student's age the answer is 163. How old is the teacher?
pogonyaev

Answer:

52

Step-by-step explanation:

We can write this out as an equation. Let's say that the teacher's age is x. Triple the teachers age plus the students age is 163, which can be written out as:

3x + 7 = 163

We want to isolate the variable, so subtract 7 from both sides. This gives us:

3x = 156

Finally, we divide both sides by  3, giving:

x=52

So the teacher is 52 years old.

Hope this helps!

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3 years ago
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Answer:

It is a rational number

Step-by-step explanation:

It is a rational number because -6/7 is equal to -0.857142 repeating. And a rational number repeats.

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6 0
4 years ago
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