Answer:
Sally bought 4 pounds of Strawberries and 3 pounds of Cantaloupes.
Step-by-step explanation:
Let the number of pounds of Strawberries bought by Sally = x
Let the number of pounds of Cantaloupes bought by Sally = y
![\[x + y = 7\]](https://tex.z-dn.net/?f=%5C%5Bx%20%2B%20y%20%3D%207%5C%5D)
---------------------------------(1)
Moreover,
![\[2.5 x + 2.25 y = 16.75\]](https://tex.z-dn.net/?f=%5C%5B2.5%20x%20%2B%202.25%20y%20%3D%2016.75%5C%5D)
---------------(2)
Solving (1) and (2) by substitution:
![\[x = 7 - y\]](https://tex.z-dn.net/?f=%5C%5Bx%20%3D%207%20-%20y%5C%5D)
=> ![\[2.5 *(7-y) + 2.25 y = 16.75\]](https://tex.z-dn.net/?f=%5C%5B2.5%20%2A%287-y%29%20%2B%202.25%20y%20%3D%2016.75%5C%5D)
=> ![\[17.5 - 2.5y + 2.25 y = 16.75\]](https://tex.z-dn.net/?f=%5C%5B17.5%20-%202.5y%20%2B%202.25%20y%20%3D%2016.75%5C%5D)
=> ![\[0.25y = 0.75\]](https://tex.z-dn.net/?f=%5C%5B0.25y%20%3D%200.75%5C%5D)
=> ![\[y = 3\]](https://tex.z-dn.net/?f=%5C%5By%20%3D%203%5C%5D)
From (1), x = 7-3 = 4
Using the calculator to find tan 27°
on the calculator there is a button with label (tan)
all we will do is to bush button in this sequence
(tan) → (2)→(7)→(=)
The answer will be 0.5095
the correct answer is option 3
Answer:
B
Step-by-step explanation:
f(0) - f(-3) = area under f'(x) from x=0 to x=3.
We can find the area under f'(x) in this interval by finding the area of the triangle formed by the line.
A = 1/2 b h
A = 1/2 (3) (3)
A = 4.5
f(0) - f(-3) = 4.5
Since f(0) = 7:
7 - f(-3) = 4.5
f(-3) = 7 - 4.5
f(-3) = 2.5
Answer:
an angle with 90 degree is a right angle
