Evaluate the following expression if w = 9, x = 7, and y = 1. wx + 4
2 answers:
Answer:
67
Step-by-step explanation:
We are given the expression:
and asked to evaluate when w=9, x=7, and y=1.
The expression does not contain the variable y, so we can disregard it.
However, the expression does have the variable x and w. We can substitute 9 in for w and 7 in for x.
Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.
First, multiply 9 and 7.
9*7=63
Next, add 63 and 4.
The expression wx+4 when evaluated for w=9 and x=7 is equal to 67.
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Answer: x = 780
Step-by-step explanation: Well <u><em>percent</em></u> means <em>over 100</em> so we can set up an equation for this problem by reading it from left to right.
So we know that <u><em>10%</em></u> means <em>10/100</em>, <u><em>of</em></u> means times, <em><u>what</u></em> <em><u>number</u></em> means <em>x</em>, <u><em>is</em></u> means <em>equals</em>, and <em><u>12</u></em> means 12.
Notice that <em>10/100</em> can be reduced to 1/10.
So rewriting our problem we have <em>X/10 = 78</em>.
To get rid of the fraction, we multiply both sides of the equation by 10 and we have <em>x = 780</em>. So, 10% of 780 is 78.
Now let's check our answer back in the original problem to see if it makes sense.
We have <em>10% of 780 is 78</em>. Well we know that 100% of of 780 would be 780 so 10% of 780 should be alot less than 780 so 78 seems to make sense.
Image provided showing my work.
