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3 years ago

PLEASE HELP ME WITH THIS THX!!!!!I REALLY NEED HELP WITH THIS!

Mathematics

2 answers:

Daniel [21]3 years ago

7 0

1. first point is x int., when y=0
x-4*0=-18, x=-18
(-18,0)
2. second point, y int, when x=0
0-4y=-18
-4y=-18
y=-18/-4=4.5
(0,4.5)
3. you can choose y=1, then x-4=-18, x=-14 , (-14,1)
or for this graph is
maybe better y=4, x-4*4=-18, x=-2 (-2,4)
x-4y=-18, y=3, x=-6 (-6,3)

UkoKoshka [18]3 years ago

4 0

I just want to reccomend desmos, it really helped me with graphing because im not so good at it

But what I got is:
x-4y=-18
x=-18+4y

Root(-18,0)
Y-intercept: (0, 9/2)

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I think the answer is D sorry if it’s wrong and good luck

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3 years ago

6. We want to build the smallest cube possible using bricks with dimensions 8 cm - 12 cm 20 cm. How many bricks do we need?

Georgia [21]

Answer:

1200

Step-by-step explanation:

We’ll need a number that is evenly dividable by all three values: 8,12 & 15. We can develop the generic common multiple by multiplying all three numbers and get 1440. But is that the smallest common multiple? The quick and dirty way to factor the number is to divide it by it’s various elements and see what works. In this case 1440/12=120 which is the smallest common multiple of the three numbers. The smallest length is therefore 120.

In order to find how many bricks just divide (120x120x120)/(8x12x15)=1200 bricks

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2 years ago

PLEASE HELP

Savatey [412]

Correct Answer: Option A

The next step in simplification will be to convert the squared term so that it no longer contains a square.

So, we are to simplify the term $cos^{2}(2x)$

Using the half-angle identity we can write:

$cos^{2}(2x)= \frac{1+cos(4x)}{2}$

Using this value, the equation becomes:

$sin^{4}x=1-2cos(2x)+ \frac{ \frac{1+cos(4x)}{2} }{4}$

Therefore, option A is the correct answer.

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3 years ago

What is the slope of -1,3 and 3,15

Otrada [13]

Answer:

Step-by-step explanation:

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3 years ago

If f(x) = 3^x + 10x and g(x) = 2x - 4, find (f + g)(x)

allsm [11]

Answer:

3^x + 12x -4

Step-by-step explanation:

f(x) = 3^x + 10x

g(x) = 2x - 4,

(f + g)(x) = 3^x + 10x + 2x - 4

Combine like terms

= 3^x + 12x -4

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3 years ago

Read 2 more answers