Answer:
2ft
Step-by-step explanation:
5 x 10=50
7 x 12= 84
5+2=7 and 10+2=12
Letter A does not show a linear function!
Answer:
See below (I hope this helps!)
Step-by-step explanation:
Let's call the number of $8, $10 and $12 as x, y and z respectively. Then, we can write the following system:
x + y + z = 360 (1)
8x + 10y + 12z = 3500 (2)
x + y = 5z (3)
5z + z = 360 (Substitute (3) into (1))
6z = 360
z = 60
x + y = 5 * 60 (Substitute z = 60 into (3))
x + y = 300 (4)
8x + 10y + 12 * 60 = 3500 (Substitute z = 60 into (2))
8x + 10y = 2780 (5)
8x + 8y = 2400 (6) -- (Multiply (4) by 8)
2y = 380 (Subtract (6) from (5))
y = 190
x + 190 = 300 (Substitute y = 190 into (4))
x = 110
Answer:
a. 4
b. 10
Step-by-step explanation:
A. If the math department buys 60 textbooks, which are $89 each, we need to multiply 60 by $89 to get the amount that the textbooks will cost. This gives us $5340. Since the math department has $7200 to spend, we subtract 5340 from 7200. This gives us $1860 that the math department has left to spend on laptops. Since the laptops cost $395 each, and we have $1860 to spend, we divide 1860 by 395 to figure out how many laptops they can buy. This is 4.7. Since you can't buy 0.7 of a laptop, they can only buy 4 laptops. The final answer is 4.
B. The math department has $7200 to spend and buys 35 textbooks, which are $89 each. Multiply 35 by 89. This is $3115. Subtract this from $7200 to see how much the department has left to spend. The math department now has only $4085 to spend on laptops, which are $395 each. Divide 4085 by 395. This gives us 10.3. We can't buy 0.3 of a laptop, so they can only buy 10 laptops. The answer is 10.
cos (75)=cos (15) nothing square and check
