Answer:
B
Step-by-step explanation:
First step is to do whatever is in the parentheses: 9-3.
Then you will multiply 7 by that number; which will give you the answer.
B is correct because it does it that way.
This is an exercise on Thermometric scales.
We have as data:
We apply the following formula:

We substitute data in the formula:

First multiply 9 x 220, then the result of this division is divided by 5.
![\large\displaystyle\text{$\begin{gathered}\sf =396+32 \ \ \to \ \ [Add] \end{gathered}$}](https://tex.z-dn.net/?f=%5Clarge%5Cdisplaystyle%5Ctext%7B%24%5Cbegin%7Bgathered%7D%5Csf%20%3D396%2B32%20%5C%20%5C%20%5Cto%20%5C%20%5C%20%5BAdd%5D%20%5Cend%7Bgathered%7D%24%7D)

Therefore the cake recipe that should be baked at 220 °C for 45 minutes, on the Fahrenteir scale is 428 °F. Which indicates that it will be very hot.
Answer:
12.
-1.9 , -1.8, -1.7
13.
Points in Quadrant IV have a positive x, and a negative y.
14.
The point (2,9) is reflected over the y-axis, which means the number in x has it's sign flipped.
(-2 , 9) is your answer
15.
In between -7 & -4 is <em>-6, -5</em>
b. -6 is your answer.
16.
Remember that Quadrant II has a negative x, and a positive y. This means that b. (-2, 5) is your answer.
17.
You are reflecting over the y-axis, so you are changing the sign of the x value.
(-3, 5) reflected over the y-axis is a. (3 , 5)
~
Answer:
Step-by-step explanation:
From the picture attached,
∠4 = 45°, ∠5 = 135° and ∠10 = ∠11
Part A
∠1 = ∠4 = 45° [Vertically opposite angles]
∠1 + ∠3 = 180° [Linear pair of angles]
∠3 = 180° - ∠1
= 180° - 45°
= 135°
∠2 = ∠3 = 135° [Vertically opposite angles]
∠8 = ∠5 = 135° [Vertically opposite angles]
∠5 + ∠6 = 180° [Linear pair of angles]
∠6 = 180° - 135°
∠6 = 45°
∠7 = ∠6 = 45° [Vertically opposite angles]
By triangle sum theorem,
m∠4 + m∠7 + m∠10 = 180°
45° + 45° + m∠10 = 180°
m∠10 = 180° - 90°
m∠10 = 90°
m∠10 = m∠12 = 90° [Vertically opposite angles]
m∠10 = m∠11 = 90° [Given]
Part B
1). ∠1 ≅ ∠4 [Vertically opposite angles]
2). ∠7 + ∠5 = 180° [Linear pair]
3). ∠9 + ∠10 = 180° [Linear pair]