Peter bought 45 greeting cards at 3 for $2.00. he sold them for 5 for $4.00. how much money did he make

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▹ Answer

37

▹ Step-by-Step Explanation

Plug in 4 for z:

10(4) = 40

Subtract:

40 - 3 = 37

Hope this helps!

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Answer: 144

Step by step: In order to solve this easily, you should convert 3/5 into a decimal. In order to do that, you have to divide the numerator by the denominator. 3 divided by 5 = 0.6. Then you multiply 240 by 0.6 to get your answer, 144.

Answer:

Step-by-step explanation:

Given the expression u= av + bw where u = 2i + j, v = i + j, and w = i - j, to find the scalars a and b, we will first substitute the vectors into the expression given as shown;

u= av + bw

2i + j = a( i + j)+b(i-j)

open the parenthesis

2i + j = ai+aj+bi-bj

collect like terms at the right hand side of the equation

2i + j = ai+bi+aj-bj

2i + j = (a+b)i+(a-b)j

compare the coefficient of complex value i and j on both sides

a+b = 2 ............... 1

a-b = 1................. 2

solve the resulting equation simultaneously using elimination method

Subtract both equation from each other.

(a-a) +(b-(-b))= 2-1

0+2b = 1

b = 1/2

Substitue b = 1/2 into equation 2 to get a

From equation 2, a = 1+b

a = 1 + 1/2

b = 3/2

Hence the scalars a and b are 1/2 and 3/2 respectively

[tex]a=\frac{3}{2},b=\frac{1}{2}[/tex]

A complex number is of the form [tex]\boldsymbol{a+ib}[/tex] where [tex]a,b[/tex] are real numbers.

[tex]u=2i+j[/tex]

[tex]v=i+j[/tex]

[tex]w=i-j[/tex]

[tex]u=av+bw[/tex]

So,

[tex]2i+j=a(i+j)+b(i-j)[/tex]

[tex]2i+j=(a+b)i+(a-b)j[/tex]

Therefore,

[tex]2=a+b\\1=a-b[/tex]

Add these equations.

[tex]3=2a\\\frac{3}{2}=a[/tex]

So,

[tex]1=\frac{3}{2}-b\\\\b=\frac{3}{2}-1\\[/tex]

  [tex]=\frac{1}{2}[/tex]

For more information:

https://brainly.com/question/19013932?referrer=searchResults

Answer:

256

Step-by-step explanation:

Multiply 16 by 16.

You bet 256, right?

The answer is 256 now.

Hope it helps!

Formula: multiply number you have x number you have.

Answer:

2x^2 is not equivalent

Step-by-step explanation:

3x = 3x

2x^2 = 2x^2

X(2+1) = 3x

2x + x = 3x

the odd one out is 2x^2

Step-by-step explanation:

Area of triangle = 1/2 × the width × the length

42 = 1/2(x+3)(2x+8)

42 = 1/2×2×(x+3)(x+4)

42 = (x+3)(x+4)

(x+3)(x+4) = 42

x² + 7x + 12 = 42

x² + 7x + 12 - 42 = 0

x² + 7x - 30 = 0

(x-3)(x+10) = 0

x = 3, -10

x can't be -10 because the width and the length should be only + values

x = 3

The value of x found by using the area of triangle concept is 3

What is the Area of a Triangle?
The entire area filled by a triangle's three sides on a two-dimensional plane is referred to as the triangle's area. The fundamental equation for a triangle's area is A = 1/2 b × h, where b and h are the product of the triangle's base and height. All triangle shapes, including scalene, isosceles, and equilateral triangles, may be calculated using this formula. It is important to keep in mind that a triangle's base and height are perpendicular to one another.

In the question, It is given that:

Area of triangle = 42.

Width of the triangle = x+3

Length of the triangle = 2x+8;

And, we know that:

Area of triangle = [tex]\frac{1}{2}[/tex]×[tex]lw[/tex]

⇒[tex]42[/tex] = [tex]\frac{1}{2}[/tex]×[tex](x+3)(2x+8)[/tex]

⇒42 = (x+3)(x+4)

⇒(x+3)(x+4) = 42

⇒x² + 7x + 12 = 42

⇒x² + 7x + 12 - 42 = 0

⇒x² + 7x - 30 = 0

⇒(x-3)(x+10) = 0

⇒x = 3, -10

x can't be -10 because the width and the length should be only + values

⇒x = 3

Hence, The value of x is 3.

To learn more about the area of the triangle visit the given link:

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Answer:

should have dded like variables first

Step-by-step explanation:

Answer:

X=6

Step-by-step explanation:

3x+2x-6=24

add 3x and 2x this gives 5x

5x-6=24

then add the 6 to 24

5x=30

then divide both sides by 5

then X=6

Answer:3 to 10

Step-by-step explanation:

Answer:

x= -30.5

Step-by-step explanation:

In order to solve equations like this, we need to have all the x terms on one side, and all the other terms on the other side. For this equation so far, the x term (2x) is not alone (there is a +2) so we need to move the +2 to the other side to have x by itself. Whatever you do to one side of equation, you must also do to the other side to keep the equation equal. Therefore we can subtract 2 from both sides which moves the two to the other side while keeping the equation equal. In order to move a term to the other side, we must do the operation opposite to what the term has. E.g. +2 is adding 2, so to move it to the other side, we need to subtract 2.

2x +2 -2 = -59 -2

Which cancels out the 2 on the left side and gives us:

2x = -59-2

2x = -61

Then we just need to remove the 2.

In this case, this 2 is being multiplied to the x, so to move it, we will need to divide both sides by 2.

2x/2 = -61/2

which finally gives us:

x = -30.5

Hope this helped!

Let's look at the multiplication exponent rule.

[tex]x^a*x^b=x^{a+b}[/tex]

Meaning that the exponents will add together when the same base is multiplied.

[tex]3^4*3^5=3^{4+5}=3^9[/tex]

Hope this helps.

頑張って!

Answer:

19683

Step-by-step explanation:

3x3x3x3= 81

3x3x3x3x3=243

81x243=19683

Answer:

$2.85 per hour

Step-by-step explanation:

Answer:

I think the answer is 35 or are trying to find how much is in and hour

Answer:

87

Step by step explanation:

(6)(16) - [tex]3^{2}[/tex]

96 - [tex]3^{2}[/tex]

96 - 9

87

Answer:

Step-by-step explanation:

There can only be 2 location which is to the right and to the left, this is because it means the difference between is 17. Add them together. So the two answers are…

17

and

-17

Answer:

5945

Step-by-step explanation:

The sum for an arithmetic series is given by the formula:

[tex]S=(x_1+x_k)\cdot\frac{k}{2}[/tex]

Where x₁ is the initial term, x_k is the last term, and k is the number of elements in the series.

From the sequence, we can see that the first term is 32. The last term is 113.

To determine how many elements we have, subtract 113 and 32:

[tex]113-32=81[/tex]

However, we must add 1 to this number since this doesn't include the first term. Thus:

[tex]81+1=82[/tex]

So, there are 82 terms in total.

Therefore, our sum is:

[tex]S=(32+113)\cdot\frac{82}{2}[/tex]

[tex]S=(145)\cdot 41=5945[/tex]

Answer:

5945

Step-by-step explanation:

an = a1 + ( n - 1) 1

a1 = first term

n = number of terms

an = last term

113 = 32 + ( n - 1 ) 1

113 = 32 + n -1

113 = 31 + n

n = 113 - 31

n = 82.

Sn = n/2(a1 + an)

S82 = 82/2 (32 + 113)

S82 = 41 (145)

S82 = 5945.

Answer:

most likely got 50 of each slice since they were the same size

Step-by-step explanation:

500/10=50

Answer:

50

Step-by-step explanation:

Answer:

3

Step-by-step explanation:

Answer:

6

Step-by-step explanation:

using similar triangles

x/(x+8) =15/35

x/(x+8) =3/7

cross multiply the two sides which will give u

3(x+8) =x*7

3x +24 =7x

24=7x-3x

24=4x

using 4 to divide both sides

24/4=4x/4

6=x

x=6

Answer: [tex]x>-28[/tex]

Simplify both sides of the inequality

[tex]1/4x<7[/tex]

Multiply both sides by 4/-1

[tex](4/-1)*(-1/4x)<(4/-1)*(7)\\x<-28[/tex]

Answer: G

Step-by-step explanation: Points are coplanar if they lie on the same plane.

So, G would be a coplanar point with E, F, and H.

Answer:

G

Step-by-step explanation:

i just took the test and got it right! (:

Answer:

The slope of the line.

Step-by-step explanation:

In other words, SLOPE is the VERTICAL change between any two points divided by the HORIZONTAL change in any two points.

Answer

The constant rate of change of a line is also called what

...SLOPE...

Answer:N/B The amount is in thousands

The total amount earned by a Bachelor's person be $x:

amount earned by a masters person will be $(2x-38)

Total amount earned by the two individuals will be:

x+(2x-38)=115

solving for x we get:

x+2x-38=115

3x=115+38

3x=153

x=153/3

x=51

also:

2x-38=2*51-38=64

therefore we conclude that master's individual earns average of $ 64,000 while the Bachelor's individual earns $51,000.

Step-by-step explanation:plzzzzz give brainleyest

Answer 7

Step-by-step explanation

do theis prdcjkfbiubnvckdnsgjibjkdsvhbrhvbbghbvhvbhbgfndjsnjdnsndj

Answer:

[tex]Rate = 0.2167\ fl\ oz/hour[/tex]

Step-by-step explanation:

Given

[tex]Rate = \frac{91\ fl\ oz}{2.5\ weeks}[/tex]

Required

Express the rate as per hour

[tex]Rate = \frac{91\ fl\ oz}{2.5\ weeks}[/tex]

There are 168 hours in  a week;

So, the rate becomes

[tex]Rate = \frac{91\ fl\ oz}{2.5 * 168\ hours}[/tex]

[tex]Rate = \frac{91\ fl\ oz}{420\ hours}[/tex]

[tex]Rate = 0.2167\ fl\ oz/hour[/tex]

Hence;

The equivalent of the given rate is [tex]0.2167\ fl\ oz/hour[/tex]

Answer:

520 feet

Step-by-step explanation:

The easiest way to visualize this problem is to sketch a quick diagram.

For this problem, you are given an angle and the length of the side of a triangle. If you look at the diagram, you'll see that the length given is the opposite side of the angle given. For this situation, that means you will use the sine function (refer to SOH-CAH-TOA acronym). Then you plug in the given values and solve for x.

Hope this helps!

Answer: 12  is the least common denominator

Step-by-step explanation:

The least common denominator is the greatest multiple that the two denominators share.

So find the multiples of 4 and 6.

LCM of 4.  is 4 ,8 ,12,16,20,24, 28,32,

LCM of 6 is 6,12,18,24,30,36, 42,48  

The first multiple that they share is 12

Hey there! I think the answer is x=(-2)

Answer:

-2

Step-by-step explanation:

Answer:

Your answer is 91, 494

Step-by-step explanation:

I will tell how is your answer is 91,494

72,931

+18,563

=91,494

Just add the question then you have your answer

Answer:

See Below.

Step-by-step explanation:

We are given the equation:

[tex]a=2x+6xz[/tex]

And we want to solve for x.

On the right-hand side, we can factor:

[tex]a=x(2+6z)[/tex]

And divide both sides by the factored expression. Hence:

[tex]\displaystyle x=\frac{a}{6z + 2}[/tex]

And we're done!

Answer:

x=a/2(1+3z)

Step-by-step explanation:

Answer: 5 feet

Step-by-step explanation: To find the width of the rectangle,

start with the formula for the perimeter, shown below.

Perimeter = 2l + 2w

Since we know the perimeter is 36 and the

length is 13, we have 36 = 2(13) + 2w.

Simplifying on the right, we have 36 = 26 + 2w.

Not subtract 26 from both sides to get 10 = 2w.

Now divide both sides by 2 and 5 = w.

So the with is 5 feet.

Answer:

the answer is 1/6.......