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svetlana [45]
4 years ago
5

Subtract

Mathematics
1 answer:
kirza4 [7]4 years ago
5 0

Answer:

Option D: 3x2 +  2x - 1

Step-by-step explanation:

Given that:

=(5x2 - 5x + 3 )- (2x2 +7x- 4)

As we have to subtract them so by simplifying:

"-" sign will alter all signs in the bracket

= 5x2 - 5x + 3 - 2x2 + 7x - 4

Now by adding same terms

= 5x2 - 2x2 - 5x + 7x + 3 -4

= 3x2 +  2x - 1

i hope it will help you!

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Two numbers have difference of 0.7 and a sum of 1. What are the numbers?
Readme [11.4K]
We can solve this by setting up 2 equations. We can use any letters like. For now, I'll use x and y.
So now we know that    x - y = 0.7   and    x + y = 1.
Now we can eliminate one of the letters by adding or subtracting one equation from the other. I am going to eliminate y by adding the two together (the y and the -y cancel).
This gives us   2x = 1.7,    and so x = 1.7 ÷ 2 = 0.85
Finally, we can substitute x for 0.85 back into one of the original equations to figure out what y equals. I'm going to use   x + y = 1.
So now we have    0.85 + y = 1,    so y = 1 - 0.85 = 0.15

The numbers, therefore, are 0.85 and 0.15 (you can check by using the other equation).

Hope this helps!
5 0
4 years ago
PLEASE PLEASE HELP
anygoal [31]

Answer:

0.00851=8.51\times 10^{-3} cm.

Step-by-step explanation:

We have been given that the average human body cell is about 5.1\times10^{-4} cm in diameter. The diameter of a plant cell is 8\times10^{-3} cm.

To find the combined diameter of the body cell and plant cell, we will add both diameters.

First of all let us convert our given diameters in standard notation.

5.1\times10^{-4}=0.00051

8\times10^{-3}=0.008

\text{The combined diameter of body cell and plant cell}=0.00051+0.008

\text{The combined diameter of body cell and plant cell}=0.00851

Let us convert our answer in scientific notation.

\text{The combined diameter of body cell and plant cell}=8.51\times 10^{-3}

Therefore, the combined diameter of the body cell and plant cell is 0.00851=8.51\times 10^{-3} cm.

3 0
3 years ago
Read 2 more answers
Please help!<br> find the value of x
kirill [66]
180-94-41 = 45
180-45-111 = 24

The answer is x is 24 degrees
8 0
3 years ago
Read 2 more answers
Please help with this dilation
GaryK [48]

Answer:

k= 1/4 m=16

Step-by-step explanation:

7 over 28 is 1/4 and 4 times 4 is 16

5 0
3 years ago
A 3-dimensional shape is made of 36 unit cubes, without any gaps. What is the volume of the shape?
fomenos

Answer:

36 unit

Step-by-step explanation:

The number of unit cubes in the shape = 36 unit cubes

The dimension (volume) of each cubes = 1 unit³

The type of shape = 3-dimensional

The arrangement of the cubes in the shape = Without gaps

The volume of a 3-dimensional shape made of a number of unit cubes without gaps is equal to the sum of the unit cubes

Therefore;

The volume of the 3-dimensional shape that consists of 36 unit cube, V = (1 + 1 + 1 +...+ 1) unit³ = 36 unit³

The volume of the 3-dimensional shap³e, V = 36 unit³

7 0
3 years ago
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