Sam must have an average of 70 or more in his summer coarse to obtain a grade of C. His first 3 test grades we

Question

Sam must have an average of 70 or more in his summer coarse to obtain a grade of C. His first 3 test grades were 75, 63, and 68. Write an inequality representing the score that Sam must get on the last test to get a C

Answer 1

Let x = the grade in the fourth test.

(75+63+68+x)/4 >= 70

Answer 2

He desires an consumer-friendly of a minimum of 70. enable n = score on the final attempt. So we've: (seventy 5 + sixty 3 + sixty 8 + n) / 4 ? 70 Now in simple terms resolve: (seventy 5 + sixty 3 + sixty 8 + n) / 4 ? 70 206 + n ? 280 n ? seventy 4 He desires a minimum of a seventy 4 on his final attempt to get a C. If he gets extra effective than seventy 4, he will nonetheless get his C. For S&Gs , I found out what he'd would desire to get a B. He'd choose 114, which isn't attainable. the reason at the back of this, is that if a a hundred might supply him a B, the respond might then be : seventy 4 ? n ? ninety 9 because of the fact it asks for what he needs to get a C, no longer a C or larger. :)

Answer 3

He needs a 74% to get at least an average of 70

Answer 4

75 + 63 + 68 + x
_____________

4

is greater than or equal to 70.

Just solve for x.