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skad [1K]
2 years ago
11

The Coolmathz family is ordering pizza. They order two pizzas. One is $15, and the other is $12. They use a coupon for 5% off th

e whole order. They then tip 18% of the cost after the coupon. How much did the Coolmathz family spend in total? Show your work
Mathematics
1 answer:
DaniilM [7]2 years ago
6 0

Answer:

30.51$

Step-by-step explanation:

15+12=27$

5% of 27$=1.35$

18% of 27=4.86

Do the math: 27+4.86-1.35=30.51

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A video store specializes in three types of movies: children's, American West, and horror. It's known that:
xenn [34]

X, y, z denote children's movies, western movies, and horror movies, respectively. The related system of equations is formed and solved.

\left\{\begin{matrix} \qquad\qquad\ \dfrac{60}{100}x + \dfrac{50}{100}y =\dfrac{30}{100}(x+y+z)\\ \dfrac{20}{100}x+ \dfrac{60}{100}y+ \dfrac{60}{100}z= \dfrac{1}{2}(x+y+z) \\ \ \ \ x+100=y \end{matrix} \right.\

Simplifying the system of equations, we have

\left\{\begin{matrix} 3x + 2y -3z=0\\ -3x+ y+ z= 0 \\ \ \ \ x+100=y \end{matrix} \right.\ \ \Longrightarrow \ \left\{\begin{matrix} 5x-3z=-200\\ -2x+ z= -100 \end{matrix} \right.\

\ \ \  5x-3z=-200\\\underline{-6x+3z=-300} \ \Rightarrow \ x=500\\\ \ -x+0= \ 500

                                       y&=500+100=600\\ z&=3(500)-600=900

The video store has 500 children's movies, 600 westerns and 900 horror movies.

6 0
2 years ago
Ling is just starting high school, and has set a long-term goal for herself to study abroad in France her senior year of college
yKpoI14uk [10]
1 Learn about the French Culture
2 Learn basic French
3 Meet a friend from France (via Penpal)
4 Study!

These are important because they will make her life in France easier and more fun!
8 0
3 years ago
Equation of the graph
natka813 [3]

Answer:

A and C

Step-by-step explanation:

It can not be D, since that will mean that <em>the line is perfectly horizontal</em>, with 0 as its slope.

It can be C, since the <em>equation's slope is positive and has a negative y-intercept</em>, like the graph.

Changing around A gives us y = 2x - 3. That has a <em>positive slope and a negative y-intercept</em>, like the graph. So, A is a possibility.

Changing around B gives us y = ²/₃x + 3. This has a positive slope, <em>but also a positive y-intercept</em>, so B can not be the answer.

4 0
3 years ago
How would you solve this: x^2-9x+18
Ostrovityanka [42]
Hope this helps you!!!

7 0
3 years ago
Read 2 more answers
Can someone pls help me with this?
Aliun [14]

Answer:

c

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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