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FinnZ [79.3K]
3 years ago
5

Simplify:–4(7x – 3y – z) – (–6)(9x – z + 2)

Mathematics
2 answers:
Zielflug [23.3K]3 years ago
8 0
It is a cause i had that on a test
Nana76 [90]3 years ago
5 0
The answer is B.
 B) 26x + 12y - 2z + 12 
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What is (1, -2) and (2, 2) as a linear equation
frutty [35]

Answer:

y=4

Step-by-step explanation:

y=2+2/2-1

y=4

8 0
3 years ago
Material for a dress costs £5.50 per metre.<br> find the cost of 10cm and 70cm
Zielflug [23.3K]

Answer:

<em>The cost of 10 cm and 70 cm are  £0.55 and £3.85 respectively.</em>

Step-by-step explanation:

Material for a dress costs £5.50 per meter.

We know that,  <u>1 meter = 100 cm</u>.

Suppose, the cost of 10 cm material is x and the cost of 70 cm material is y

Now, <u>according to the ratio of "cost" to the "length of material"</u> , we will get.......

\frac{x}{10} =\frac{5.50}{100}\\ \\ 100x=10*5.50=55\\ \\ x=\frac{55}{100}=0.55

and

\frac{y}{70} =\frac{5.50}{100}\\ \\ 100y=70*5.50=385\\ \\ x=\frac{385}{100}=3.85

So, the cost of 10 cm material is £0.55 and the cost of 70 cm material is £3.85

5 0
3 years ago
3x + 4y = 12<br> x + 2y = 10
borishaifa [10]

Answer:

x=-8 and y=9

Step-by-step explanation:

rewrite the equations to x+2y=10,3x+4y=12

sub 2y from both sides x+2y-2y=10-2y

substitue x=10-2y in 3x +4y=12

3(-2y+10)+4y=12

distribute

add-30 to both sides

divide both sides by -2

y=9

sustitute 9 for y in -2y+10=x

x=-8

7 0
3 years ago
What is the midpoint of the segment shown below (2, 4) and (2, -7)
navik [9.2K]

Answer:

(2,-1.5)

Step-by-step explanation:

There are 11 points in between the two points therefore it has to be (2,-1.5)

7 0
3 years ago
Pleaseeeeeee helpppppppp​
mixer [17]

Answer:

B) Multiplying by 0

Step-by-step explanation:

This answer is correct because lets say we have a nonzero number, (IN this case lets say 4) 4+0 is 4, and that does not change the value because it is still 4, so A is not correct. Multiplying by 1 and dividing by one leads to the same conclusion. They both wind up to 4. The only one is B) because 4x0 is 0 and that isn't 4, so it changes value.

Hope this helped :)

5 0
2 years ago
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