Answer:
x
=
4
f
/5
+
4/
5
Step-by-step explanation:
Answer:
- 9. B, 10. A, 11. A, 12. D
Step-by-step explanation:
<h3>Question 9</h3>
<u>The smaller number is x, the greater number is x + 4, their sum is 52:</u>
Correct choice is B
<h3>Question 10</h3>
<u>$8 and 9n should sum at least $80:</u>
- 8 + 9n ≥ 80 ⇒ 9n ≥ 72 ⇒ n ≥ 8
Correct choice is A
<h3>Question 11</h3>
<u>$43 and 3n should sum at least $70:</u>
- 43 + 3n ≥ 70 ⇒ 3n ≥ 27 ⇒ n ≥ 9
Correct choice is A
<h3>Question 12</h3>
<u>P books cost $10.01p and $9.96 for shipping, the total should be no more than $50:</u>
- 9.96 + 10.01p ≤ 50 ⇒ 10.01p ≤ 40.04 ⇒ p ≤ 4
Correct choice is D
Proportional relationship
We know a proportional relationship is when one of the variable is obtained by multiplying the other variable by a constant number.
For example, in an equation it can be represented:
<em>y = 2x</em>
<em />
In a table, we can represent it by
<em />
In a graph,
Answer: all of them
Answer:
8
Step-by-step explanation:
4(x-3)=20 8-3=5 4(5)=20
Plug in -2 for y then solve for x. The answer should be x= -2