If we multiply or divide both sides of an inequality by a negative number, you have to flip the inequality. Hope this helps :)
Answer:
C
Step-by-step explanation:
The average would be -3. You add all the low temps up and get -15 then you divide it by the amount which was 5 temps... And get -3.
Answer:
11
Step-by-step explanation:
The two equations appear to be ...
- 12x +4y = 152
- 32x +12y = 420
These can be solved for y using Cramer's rule:
y = (152(32) -420(12))/(4(32) -12(12)) = -176/-16 = 11
The cost of the vegetarian lunch is 11.
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<em>Comment on Cramer's Rule</em>
For equations ...
ax +by =c
dx +ey = f
The solutions are ...
x = (bf -ey)/(bd -ea)
y = (cd -fa)/(bd -ea) . . . . note the denominators are the same expression
Once you memorize the pattern of products, this can be the simplest way to solve a pair of equations--especially if you only need one of the variable values.
Answer:
5(x−1)(x+4)? i think
Step-by-step explanation:
