1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Contact [7]
3 years ago
13

Given the system y > -2 x + y < 4

Mathematics
1 answer:
katen-ka-za [31]3 years ago
7 0

1. Points that lie on the intersection area of the inequalities are solutions.

For example (0,2), (-4,4), (2,-1), (-8,0) and all others which lie in this area.

2 Not solutions are points that are on the lines (because we have signs > and <, not ≤ and ≥), or on the areas that are not intercepted. For example, (6,2), (2,2), (2,-4),(-6,-2).

You might be interested in
Please help and explain!!!!!
FinnZ [79.3K]

Let x be the amount of the 30% alloy and y the amount of the 60% alloy the metalworker will use. However much is used, the final alloy will have a mass of

x+y=100

kilograms. For each kg of the 30% alloy used, 0.3 kg is copper; similary, each kg of the 60% alloy contributes 0.6 kg, so that

0.3x+0.6y=0.54(x+y)=54

Now,

x+y=100\implies y=100-x

\implies0.3x+0.6(100-x)=54

\implies60-0.3x=54

\implies0.3x=6

\implies x=20

\implies y=100-20=80

6 0
4 years ago
Solve the equation<br> 9x² – 29x – 28 = 0<br> Give your answers to 2 decimal places when appropriate
andrew-mc [135]

Answer:

x = 4 or x = 0.78

Step-by-step explanation:

9x² – 29x – 28 = 0

2 roots: x = ((-(-29) ± √(-29)² - 4 x 9 x (-28)) / (2 x 9)

               = (29 ± √841 + 1008) / 18

               = (29 ± 43) /18

x = 72 /18 = 4     or

x = -14 /18 = - 0.78

4 0
3 years ago
(5x^2+8x+18)+(11x^2-17x-7)
GuDViN [60]

Answer: 16x^2 - 9x + 11

Step-by-step explanation:

(5x^2+8x+18)+(11x^2-17x-7)

5x^2+8x+18+11x^2-17x-7

16x^2 - 9x + 11

3 0
3 years ago
Read 2 more answers
The table shows the temperatures in degrees Celsius, y, inside a shed at x hours past noon. The maximum and minimum temperatures
kolbaska11 [484]

Answer:

B

y = 3 cos (pi/12x - pi/4) + 17

Step-by-step explanation:

First find the average temperature which is 20 + 14/2 = 17

Find the amplitude

20 - 17 = 3

This means that that at noon, the shift is 3hrs past

the best equation that represents this scenario is y = 3 cos (\frac{\pi}{12}x - \frac{\pi}{4}) + 17

5 0
3 years ago
Find the missing side length
DochEvi [55]
Tan=o/adj
Tan=60/b
B=60/tan(68)
I don't have a calculator on me but you should be able to do it from there
3 0
3 years ago
Other questions:
  • Ice cream cone will hold a scoop of ice cream in shape of a sphere. Scoop of ice cream has a radius of 1.25 inches. How tall sho
    10·1 answer
  • Chuck plans to go on a hiking trip. Before the hiking trip, Chuck's bank account has $129.50. He then spends $129.50 on hiking g
    6·1 answer
  • If you have a cat what is it name
    13·2 answers
  • Rewrite each equation in slope intercept form if necessary . Then determine whether the lines are parallel. Explain.
    7·1 answer
  • 36 is _____% of 60?<br> A. 24%<br> B. 40%<br> C. 60%<br> D. 67%
    5·1 answer
  • Answer This plz I need it <br> only answer if you know the answer and need the steps
    8·2 answers
  • Please help I will give points
    12·1 answer
  • If you shift the linear parent function, f(x) = x, down 6 units, what is the
    13·1 answer
  • What is the answer of this y= 1/5 x–9
    7·2 answers
  • What is the slope of the line through (- 7 8 and 0 4?; What is the slope of the line that passes through the points − 1 − 7 − 1
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!