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
Answer:
x = 6
Step-by-step explanation:
These two angles make a complementary angle meaning the sum of the angles will be 90°. We can use this information to make an equation to solve for x.
10x + 30 = 90 (Given)
10x = 60 (Subtract 30 on both sides)
x = 6 (Divide 10 on both sides)
There would be 40 20cent coins, 40 10cent coins, and 40 5cent coins.
Answer:
Can complete a work in 12 days working 8 hours a day Q can complete the same work in 8 days working 10 hours a day if both p and q work together working 8 hours a day in how many days?
Step-by-step explanation:
Answer:
26
Step-by-step explanation:
Area of a triangle is:
A = 1/2 b h
Given b = 13 and h = 4:
A = 1/2 (13 cm) (4 cm)
A = 26 cm²