Answer:
- 24 cm²
- 6400 -1600π ≈ 1373.45 square units
Step-by-step explanation:
1. You can look at this several ways.
It can be considered to be a stack of 1+2+3 = 6 squares that are 2 cm on a side, so have a total area of 6 × (2 cm)² = 24 cm².
You can lop off one of the squares sticking out and put it into the empty corner to form a 6 cm by 4 cm rectangle with an area of (6 cm)(4 cm) = 24 cm².
You can consider it to be a 6 cm square with 3 squares cut out of it that are 2 cm on a side: (6 cm)² -3(2 cm)² = (36 -12) cm² = 24 cm².
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2. The shaded area is the difference in areas of a square 80 units on a side and a circle of 40 units radius. If we let d represent the side dimension of the square, then the area formulas are ...
Square area = d²
Circle area = π(d/2)²
So the difference area is ...
shaded area = d² -(π/4)d² = d²(1 -π/4)
For d=80, the shaded area is ...
shaded area = 80²(1 -π/4) = 6400 -1600π ≈ 1373.45 square units
Step-by-step explanation:
Maths is simple
expand the bracket
then you add like terms 2x to 6x givind you
this is how you solve it
i have to get the right question
this is simplified
and also been a expanded
Answer:
(Sorry, I only remember how to do 1 through 7)
1. -8.86
2. 17.5
3. -6.12
4. 1.66
5. 11/24
6. 4/5
7. 14
Step-by-step explanation:
1. -5.51-3.35=-8.86
2. -59.5/-3.4=17.5
3.0.85*-7.2=-6.12
4. -0.59+2.25=1.66 (The double negatives become positive)
5. 3/8+ 1/12=11/24
6. (-24/25)/(-6/5)=4/5
7. 28/2=14
Answer: x = 8
<u>Step-by-step explanation:</u>
4x + 18 + 5x = 90
9x + 18 = 90 <em>Added like terms</em>
9x = 72 <em>Subtracted 18 from both sides</em>
x = 8 <em>Divided both sides by 9</em>
BONUS: The sum of these two angles is 90°, which means these angle are complementary.
The answer is -30.
Why: If x = 10, then you fill in -2(10 + 5). Do -2 times 10 and -2 times 5. The new equations is (-20 + -10). When you add two negatives, the answer will be a negative so the answer is -30.
Hope this helps, if you need any further help or questions on this, message me! :)
