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4 years ago

What value of x makes this equation true?

Mathematics

1 answer:

Alex73 [517]4 years ago

4 0

Answer:

$x=9/4=2.25$

Step-by-step explanation:

The model is essentially saying:

$3(-x)+10(1)=5(x)+8(-1)$

Simplify:

$-3x+10=5x-8$

Subtract 5x from both sides:

$-8x+10=-8$

Subtract 10 from both sides:

$-8x=-18$

Divide both sides by -8. The negatives cancel:

$x=18/8$

Reduce:

$x=9/4=2.25$

And we're done!

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Expand and simplify 3(2a+3b)+2(a+2b)

ICE Princess25 [194]

Answer:

8a+13b

Step-by-step explanation:

First start by multiplying the coefficient with the parantheses.

3(2a+3b)+2(a+2b)

6a+9b+2a+4b

8a+13b

This equation cannot be further simplified.

5 0

3 years ago

Read 2 more answers

2 divided by square root 13 plus square root 11

coldgirl [10]

Answer: 3.87132498658 in other words 3.871

Step-by-step explanation:

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2 years ago

Brown rice costs $2 per pound, and beans cost $1.60 per pound. Lin has $10 to spend on these items to make a large meal of beans

Valentin [98]

Answer:

1. $2r+1.6b=10$

2. $r=5-0.8b$

3. $b=6.25-1.25r$

Step-by-step explanation:

<h3> The complete exercise is: "Brown rice costs $2 per pound, and beans cost $1.60 per pound. Lin has $10 to spend on these items to make a large meal of beans and rice for a potluck dinner. Let b be the number of pounds of beans Lin buys and r be the number of pounds of rice she buys when she spends all her money on this meal.</h3><h3>1. Write an equation relating the two variables.</h3><h3>2. Rearrange the equation so "b" is the independent variable.</h3><h3>3. Rearrange the equation so "r" is the independent variable."</h3><h3 />

1. According to the information exercise given in the exercise, the cost per pounds of brown rice is $2. Since "r" represents the number of pounds of rice Lin buys, the total cost of the brown rice she buys can be represented with this expression:

$2r$