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4 years ago

Simplify -4(3-1)+2

Mathematics

1 answer:

nikdorinn [45]4 years ago

7 0

To solve this you must use the rules of PEMDAS (Parentheses, Exponent, Multiplication, Division, Addition, Subtraction)

First we have parentheses.

-4(3 - 1) + 2

3 - 1 = 2

-4(2) + 2

We have no exponents so go on to multiplication

-4(2) + 2

-4 * 2 = -8

-8 + 2

No division so go to addition

-8 + 2

When adding a positive number with a negative number you will act as if you are subtracting the two numbers, then take the sign of the largest number (disregarding the signs). In this case the largest number is 8 and its sign is negative. Your answer will have a negative sign.

-6

Hope this helped!

~Just a girl in love with Shawn Mendes

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PLEASE ANSWER! (BRAINLIEST)

gavmur [86]

First, find the distance AB by the formula:

$AB=\sqrt{(x_B-x_A)^2+(y_B-y_A)^2}.$

If A(0,-7) and B(8,8), then

$AB=\sqrt{(8-0)^2+(8-(-7))^2}=\sqrt{8^2+15^2}=\sqrt{64+225}=\sqrt{289}=17.$

Dilating polygon ABCD by a scale factor of 2 with the center of dilation at the origin to create polygon A′B′C′D′, you increase the distance AB twice, A'B'=2AB. Thus, A'B'=2·17=34 units.

Answer: AB=17 units, A'B'=34 units.

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4 years ago

Solve for x:<br> <img src="https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7Bx%2By%7D%20-%5Cfrac%7B3x-3y%7D%7B2x-3y%7D%20%2A%28%5Cfrac%7B

zlopas [31]

Answer:

x = -(3 y)/2

Step-by-step explanation:

Solve for x:

-2 x - 3 y + 3/(x + y) - (3 x - 3 y)/(x^2 - y^2) = 0

Simplify and substitute z = x + y.

-2 x - 3 y + 3/(x + y) - (3 x - 3 y)/(x^2 - y^2) = -y - 2 (x + y)

= -y - 2 z:

-y - 2 z = 0

Multiply both sides by -1:

y + 2 z = 0

Subtract y from both sides:

2 z = -y

Divide both sides by 2:

z = -y/2

Substitute back for z = x + y:

x + y = -y/2

Subtract y from both sides:

Answer: x = -(3 y)/2

4 0

3 years ago

Melinda donated fudge for the school bake sale. She wrapped 80 pieces of fudge. Each piece of fudge weighed 1 ounce. How many po

xxMikexx [17]

Answer:

Melissa wrapped 5 pounds of fudge

Step-by-step explanation:

This is the correct question

Melinda donated fudge for the school bake sale. she wrapped 80 pieces of fudge. each piece of fudge weighed 1 ounce. how many pounds of fudge did melinda wrap?

In this question, we are asked to calculate the pounds of fudge wrapped by Melinda.

Firstly, we need to calculate the total weight of the fudge wrapped by Melinda in pounds.

From the question , we can identify that she wrapped 80 fudge with each of the fudge weighing 1 ounce each.

The total weight of all the fudge wrapped in ounces would be 80 * 1 = 80 ounces

Now, let’s convert this weight in ounces to pounds.

Mathematically, there are 16 ounces in a pound.

Hence, the weight in pounds of 80 ounces would be; 80/16 = 5 pounds

6 0

4 years ago

Read 2 more answers

I will give BRAINLIEST PLS HELP y = x + 1/2 and z = 2x - 3, which of the following is equivalent to y + yz? PLS HELP

STALIN [3.7K]

Answer:

y+yz is: $2x^2-2x-1$

Step-by-step explanation:

Given expressions are:

$y = x+\frac{1}{2}\\z = 2x-3$

The given expressions are polynomials and we have to find the value of y+yz

First of all, we will find the product of y and z

We will use the distribution to find the product.

$yz = (x+\frac{1}{2})(2x-3)\\= x(2x-3)+\frac{1}{2}(2x-3)\\= 2x^2-3x+x-\frac{3}{2}\\=2x^2-2x- \frac{3}{2}$

The next step is to add y and yz

$y+yz = (x+\frac{1}{2})+(2x^2-3x-\frac{3}{2})\\Combining\ like\ terms\\= 2x^2+x-3x+\frac{1}{2} -\frac{3}{2}\\=2x^2-2x + \frac{1-3}{2}\\=2x^2-2x+\frac{-2}{2}\\=2x^2-2x-1$

The answer is not one of the options which i assume might be a typing mistake.

Hence,

y+yz is: $2x^2-2x-1$

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3 years ago

The concentration of bacteria B in millions per milliliter after x hours is given by B(x)=1.33e^0.15x. After how many hours will

BARSIC [14]

Answer:

21 hours

Step-by-step explanation:

You want to find x such that B(x) = 31. Fill in the value and solve.

... 31 = 1.33e^(0.15x)

... 31/1.33 = e^(0.15x) . . . . divide by 1.33

... ln(31/1.33) = 0.15x . . . . take the natural log

... ln(31/1.33)/0.15 = x ≈ 20.992 . . . . hours

After 21 hours, the concentration will be 31 M/mL.

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3 years ago

Simplify -4(3-1)+2 ​

Simplify -4(3-1)+2