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Monica [59]
3 years ago
13

Help ASAP math homework

Mathematics
2 answers:
astraxan [27]3 years ago
5 0
\left\{\begin{array}{ccc}y \ \textgreater \  -x-3\\y\leq4x+2\end{array}\right\\\\y=-x-3\\for\ x=0\to y=-0-3=-3\to(0;-3)\\for\ x=-3\to y=-(-3)-3=3-3-=0\to(-3;0)\\\\y=4x+2\\for\ x=0\to y=4(0)+2=0+2=2\to(0;2)\\for\ x=-1\to y=4(-1)+2=-4+2=-2\to(-1;-2)\\\\Answer\ in\ attachment

poizon [28]3 years ago
4 0
See attachment for graph.

Notes: graph each line as if they are "equal".
Then draw the lines as:
dashed for < and > 
solid for ≤ and ≥
Next, choose a test point and plug it into both equations.  If the result is True for BOTH equations, then shade that section.

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Smith's apples weigh 4 oz each. how many apples are in 1 lb of apples
lutik1710 [3]
1 pound= 16 oz

16/4= 4 apples

Hope this helps!
4 0
3 years ago
Read 2 more answers
3) Two cars leave Cincinnati at the same time. Car A moves East at a constant speed of 60 miles per hour, while car B
Inessa [10]

Answer:

D). 262.5 miles.

Step-by-step explanation:

The speed at which they are drawing apart = 60 + 45 = 105 mph.

So in 2.5 hours they wiil be

2.5 * 105

= 210 + 52.5

= 262.5 miles.

4 0
2 years ago
Please help me with this!!<br> Thank u
topjm [15]

Answer:

Step-by-step explanation:

Left

When a square = a linear, always expand the squared expression.

x^2 - 2x + 1 = 3x - 5                Subtract 3x from both sides

x^2 - 2x - 3x + 1 = -5

x^2 - 5x +1 = - 5                      Add 5 to both sides

x^2 - 5x + 1 + 5 = -5 + 5

x^2 - 5x + 6 = 0

This factors

(x - 2)(x - 3)

So one solution is x = 2 and the other is x = 3

Second from the Left

i = sqrt(-1)

i^2 = - 1

i^4 = (i^2)(i^2)

i^4 = - 1 * -1

i^4 = 1

16(i^4) - 8(i^2) + 4

16(1) - 8(-1) + 4

16 + 8 + 4

28

Second from the Right

This one is rather long. I'll get you the equations, you can solve for a and b. Maybe not as long as I think.

12 = 8a + b

<u>17 = 12a + b         Subtract</u>

-5 = - 4a

a = - 5/-4 = 1.25

12 = 8*1.25 + b

12 = 10 + b

b = 12 - 10

b = 2

Now they want a + b

a + b = 1.25 + 2 = 3.25

Right

One of the ways to do this is to take out the common factor. You could also expand the square and remove the brackets of (2x - 2). Both will give you the same answer. I think expansion might be easier for you to understand, but the common factor method is shorter.

(2x - 2)^2 = 4x^2 - 8x + 4

4x^2 - 8x + 4 - 2x + 2

4x^2 - 10x + 6    The problem is factoring since neither of the first two equations work.

(2x - 2)(2x - 3)     This is correct.

So the answer is D

5 0
3 years ago
Please help me im not good at maths :(((
lapo4ka [179]

Answer:

A) 11% B) 60

Step-by-step explanation:

(for A) if you add all the "Frequency" it adds up to 100, so we don't need to do any maths for that because we already have our 100% right there. So less maths to do because if that right there is already the whole, then the frequency of it is the % out of 100%

(for B) If you take your calculator and do 12 x 500, you get 6,000, press the "%" button and it gives you the percent of what that probability of getting 6 after rolling 500 times with its sent frequency

(took me a minute to learn this this for you... by that i mean i messed around with my calculator for like 3 minutes) Hope this is right.

3 0
3 years ago
A map has the scale of 1:50000
goldenfox [79]

Answer:

500,000km

Step-by-step explanation:

Scale: 1cm:50000km

10 cm = 50000*10km

10 cm = 500000km

5 0
3 years ago
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