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3 years ago

Please help I don't understand

Mathematics

1 answer:

Papessa [141]3 years ago

7 0

Answer:

A 200

Step-by-step explanation:

The total price of the items solve was 1185

Take the low end of the price range or 4

Divide 1185 by 4

1185/4 =296.25 items could be sold for 4 dollars

Take the high end of the price range or 8

Divide 1185 by 8

1185/8 =148.125 items could be sold for 8 dollars

The number of items sold must be somewhere in between these two numbers.

148< number of items sold < 296

The only item on the list is 200

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The price of an American Airlines ticket to Boston increased to $600. This is a 15 percent increase. What was the old fare? Roun

FinnZ [79.3K]

The old fare was "x"
then it got bumped up by 15%, and the new price is x + 15% of x,
so.. one could say, that "x" is the 100%, then you add a 15% to
it, to get 600
thus $\bf \begin{array}{ccllll}
amount&\%\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
x&100\\
600&100+15
\end{array}\implies \cfrac{x}{600}=\cfrac{100}{100+15}$

solve for "x"

8 0

3 years ago

-2x - y = -9 5x -2y = 18 Solve as a whole number

nexus9112 [7]

Answer:

x = 4, y = 1

(4, 1)

Step-by-step explanation:

-2x - y = -9

5x -2y = 18

-2x - y = -9

+2x +2x

-y = 2x - 9

/-1 /-1

y = -2x + 9

5x -2y = 18

5x - 2(-2x + 9) = 18

5x + 4x - 18 = 18

9x - 18 = 18

+ 18 + 18

9x = 36

/9 /9

x = 4

Now, we solve for y:

-2(4) - y = -9

-8 - y = -9

+ 8 +8

-y = -1

/-1 /-1

y = 1

(x, y) -> (4, 1)

Hope this helps!

6 0

3 years ago

A vendor sells hot dogs, bags of potato chips, and soft drinks. A customer buys 4 hot dogs, 3 bags of potato chips, and 4 soft d

makkiz [27]

Hi, Siyasi2 ! Let x = the number of hot dogs, y = the number of chips, and z = the number of drinks. Then we know:

5x + 4y + 5z = 15.75

x = y + 0.75

z = 2x - 1

Let's substitute the 3rd equation into the first one.

5x + 4y + 5(2x - 1) = 15.75

5x + 4y+ 10x - 5 = 15.75

15x + 4y = 20.75

Now, let's re-write the 2nd equation as x - y = 0.75

We now have a system of two equations with two unknowns.

15x + 4y = 20.75

x - y = 0.75

To solve this, we can multiply the bottom equation by 4 and add.

15x + 4y = 20.75

+ 4(x - y = 0.75)

19x = 23.75

or x = 1.25

If x = 1.25, then using the one of the equations above, we can solve for y.

x - y = 1.25 - y = 0.75

.50 = y

Since z = 2x - 1, then z = 2(1.25) - 1 = 2.5 - 1 = 1.50

So, a hot dog is $1.25, chips are 50 cents, and a soft drink is $1.50. Please let me know if you have any questions.

5 0

3 years ago

Pre-orders for the yearbook cost $38 each and full price cost $45 each. If 24 students in Mr. Hillman's class purchased yearbook

aleksandr82 [10.1K]

15 students preordered the year book and 9 students paid full price.

Solution:

Given that

Cost of pre-ordered year book = $\$38$ each

Cost of full price of year book = $\$45$ each

Number of students in Mr. Hillman's class purchased yearbooks = 24

Total price spent by 24 students to purchase year book = $\$975$

Need to determine number of students pre-ordered and number of students paid full price.

Let assume number of student pre-ordered year book = x

As out of 24, x students pre-ordered the yearbook , so remaining are the ones who paid full price

So number of students paid full price = $24-x$

Money spent by students who pre-ordered the book = number of student pre-ordered year book multiplied by Cost of 1 pre-ordered year book = $x\times38 = 38x$

Money spent by students who paid full price = number of students paid full price x Cost of 1 full price year book = $(24-x)\times 45 = 1080-45x$

Total price spent by 24 students to purchase year book = Money spent by students who pre-ordered the book + Money spent by students who paid full price

$\Rightarrow 975=38 x+1080-45 x$

On solving above expression for x, we get

$\begin{array}{l}{\Rightarrow 975-1080=38 x-45 x} \\\\ {\Rightarrow-105=-7 x} \\\\ {\Rightarrow \frac{-105}{-7}=x} \\\\ {\Rightarrow x=15}\end{array}$