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4 years ago

Simplify the expression

Mathematics

2 answers:

Agata [3.3K]4 years ago

4 0

8v-2+3v = 11v-2 You have to add 8v and 3v

Gelneren [198K]4 years ago

3 0

No, You take 8v - 2 + 3v and re arrange it so its: 8v + 3v - 2, then combine like terms resulting in: 11v - 2

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What is the gradient of the line 2y-8x =6

FromTheMoon [43]

Answer:

First write the equation in the form

y = mx +c

m = Gradient

2y - 8x = 6

2y = 8x + 6

Divide both sides by 2

You will get

y = 4x + 3

m = 4

Comparing with the above equation

Gradient of the line is 4

Hope this helps.

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3 years ago

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snow_lady [41]

Answer: the answer is a

Step-by-step explanation: if you look at the choices they give you it’s would help you see if they look alike

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4 years ago

Calculate the length of the circumference of a circle with radius of 2.8cm

kykrilka [37]

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3 years ago

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The graph shows a function.<br> Find the value of b and d.

True [87]

Answer:

<em>The required values are b=-6 and d=4</em>

Step-by-step explanation:

The graph corresponds to the function

$r(x) =x^2+bx^2+8x+d$

We are required to find the values of b and d.

They can be found by using two points that are clearly visible on the graph. For example, the points (0,4) and (2,0) belong to the function. Substituting their values in the function:

$4 =0^2+b*0^2+8*0+d$

Simplifying:

4 = d

d = 4

Now use the point (2,0):

$0 =2^2+b*2^2+8*2+d$

Since d=4, and calculating

$0 =4+4b+16+4$

Simplifying:

$4b = -24$

Dividing by 4:

$b = -24/4 = -6$

$b = -6$

The required values are b=-6 and d=4

5 0

3 years ago

Would the scale factor 4.2 enlarge,reduce,or preserve

Juli2301 [7.4K]

Hey there! I'm happy to help!

Let's look at what scale factors would be able to enlarge, reduce, and preserve first. We will use the point (1,1) as an example.

ENLARGE

When we talk about scale factors, both of our numbers of the ordered pair will be multiplied by that number. To make it bigger, we will multiply it by anything larger than a one, we could have a scale factor such as 2, 100, 579395. etc.!

Dilation of 2

(1,1)⇒(2,2)

REDUCE

To reduce our ordered pair, our scale factor must be a number greater than zero but less than one because it cannot switch quadrants, which is what would happen if we used negative numbers. Our reduced number must be greater than zero. We can use 1/2, 1/4, 1/100, 0.67 etc.

Dilation of 1/2

(1,1)⇒(0.5,0.5)

PRESERVE

What would we multiply an ordered pair by to make it stay the same? One of course! This is the only number that will keep it the same!

Dilation of 1

(1,1)⇒(1,1)

Now, let's think of any scale factor as X and see what rules it has to follow to be enlarging, reducing, or preserving.

ENLARGING SCALE FACTOR: X>1

REDUCING SCALE FACTOR: 0<X<1

PRESERVING SCALE FACTOR: X=1

So, where does 4.2 fall? Well, as you can see, 4.2 is greater than one, so this scale factor would make our point larger.

Therefore, 4.2 would enlarge.

I hope that this helps! Have a wonderful day!

8 0

3 years ago