The difference (subtraction) of 6 times a number (x represents number) and 7. This gives us 6x-7. That is equal to five times (multiplication) the sum (addition) of the number, x, and 4. This gives you = 5(x+4) and combined gives us B, 6x-7=5(x+4).
<span>If you would like to know in which step did the student first make
an error, you can find this using the following steps:
y = 4 - 2z
4y = 2 - 4z
________________
-4(y) = -4(4 - 2z)
</span>4y = 2 - 4z<span>
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-4y = -16 + 8z ... Step 2
</span><span>4y = 2 - 4z</span><span>
________________
0 = -16 + 8z + 2 - 4z</span>
<span>16 - 2 = 4z</span>
<span>14 = 4z</span>
<span>z = 14/4 = 7/2</span>
<span>
The correct result would be: Student made an error in Step 2.</span>
Answer:
n = 6+x
Step-by-step explanation:
Given that:
Amy is 6 years old than her brother Leo
Let consider the age of Leo to be x since we are not yet told how old is Leo
Then Amy is 6+x
Now, we know that Leo is seven years old,
i.e x = 7
If n stands for Amy's age,
Then, the algebraic expression showing how old is Amy's age can be expressed as n = 6+x
Amy's age (n) = 6+7
Amy's age (n) = 13
Answer:
8, 4, and 2 can not be the lengths of the sides of a triangle.
Step-by-step explanation:
If a and b are the two side's length of a triangle then the length of the third line (c) will be governed by the relation
(a+ b) > c > (a - b)
Now, the two sides length of a triangle are given by 8 and 4 then the length of the third side (x) will be given by
(8 + 4) > x > (8 - 4)
⇒ 12 > x > 4 ........... (1)
But here the third side length is 2 which does not satisfy the above condition (1).
Hence, a triangle can not have side lengths 8, 4, and 2. (Answer)
