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Rufina [12.5K]
2 years ago
7

Add the linear expressions

Mathematics
2 answers:
Ganezh [65]2 years ago
7 0

Answer:

-3x -4

Step-by-step explanation:

did the test

mr_godi [17]2 years ago
3 0

Answer:

2x² + 4x - 8 - 4x² + x - 1

I rearranged it so that like terms are placed next to each other:

2x² - 4x² + 4x + x - 8 - 1

- 2x² + 5x - 9

Step-by-step explanation:

hope this helps

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2. The cost of a bicycle is * 2895. Find the cost of 1486 bicycles,
forsale [732]

Answer:

4,301,970

5,149,815

Step-by-step explanation:

The cost of a bicycle is 2895

Therefore the cost of 1486 bicycles is

= 2895×1486

= 4,301,970

A truck can carry 6785 kg of food

Therefore the amount in which 759 truckj can carry can be calculated as follows

= 6785×759

= 5,149,815

7 0
2 years ago
HURRY I NEED HELP QUICK!!!!!!!
juin [17]

Answer:

<h3>y = 35x</h3>

Step-by-step explanation:

If you notice, point 4 on the x-axis (horizontal) coincides with 140 on the y-axis.

If you multiply x * 35 = 140

x is four.

4 0
2 years ago
What value of m makes the triangles similar?
loris [4]
C Becuase it’s the same triangle but doubled
3 0
1 year ago
Chose parameters h and k such that the system has a) a unique solution, b) many solutions, and c) no solution. X1 + 3x2 = 4 2x1
AysviL [449]

Answer:

a) The system has a unique solution for k\neq 6 and any value of h, and we say the system is consisted

b) The system has infinite solutions for k=6 and h=8

c) The system has no solution for k=6 and h\neq 8

Step-by-step explanation:

Since we need to base the solutions of the system on one of the independent terms (h), the determinant method is not suitable and therefore we use the Gauss elimination method.

The first step is to write our system in the augmented matrix form:

\left[\begin{array}{cc|c}1&3&4\\2&k&h\end{array}\right]

The we can use the transformation r_0\rightarrow r_0 -2r_1, obtaining:

\left[\begin{array}{cc|c}1&3&4\\0&k-6&h-8\end{array}\right].

Now we can start the analysis:

  • If k\neq 6 then, the system has a unique solution for any value of k, meaning that the last row will transform back to the equation as:

(k-6)x_2=h-8\\x_2=h-8/(k-6)

from where we can see that only in the case of k=6 the value of x_2 can not be determined.

  • if k=6 and h=8 the system has infinite solutions: this is very simple to see by substituting these values in the equation resulting from the last row:

(k-6)x_2=h-8\\0=0 which means that the second equation is a linear combination of the first one. Therefore, we can solve the first equation to get x_1 as a function of x_2 o viceversa. Thus,  x_2 (x_1) is called a parameter since there are no constraints on what values they can take on.

if k=6 and h\neq 8 the system has no solution. Again by substituting in the equation resulting from the last row:

(k-6)x_2=h-8\\0=h-8 which is false for all values of h\neq 8 and since we have something that is not possible (0\neq h-8,\ \forall \ h\neq 8) the system has no solution

6 0
3 years ago
Explain to a classmate why 0.8 and 0.80 name the same number.
AlladinOne [14]

Because the decimal point dosent change therefor u have the same number.

7 0
3 years ago
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