Answer:
Can't see the picture brah
Step-by-step explanation:
No the answer is 5x because simply then,add x
Answer:
see explanation
see explanationStep-by-step explanation:
21
Note that
(a -
)²
= a² - 2 + ![\frac{1}{a^2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Ba%5E2%7D)
= a² +
- 2
= 11 - 2
= 9
Thus
(a -
)² = 9 ( take the square root of both sides )
a -
= 3
22
Since the expression is a perfect square, then
(4x + 5y)²
= 16x² + 40xy + 25y²
Comparing coefficients, then
a - 1 = 40 ( add 1 to both sides )
a = 41
23
99² - 87² ← is a difference of squares and factors as
= (99 - 87)(99 + 87)
= 12 × 186 = 1152, thus
24a = 1152 ( divide both sides by 24 )
a = 48
Answer:
3. 1/28
4. About 7.11%
Step-by-step explanation:
3.
Since two of the eight ads are by a local retailer, the probability of picking either one once is 2/8=1/4. However, the second time, since on of the ads has already been used and there are a total of 7 left, the new probability is 1/7. Multiplying these two together, you get 1/4*1/7=1/28.
4.
To find the probability, you need to find the area of the smaller triangle and the rest. The formula for the area of an equilateral triangle is
, meaning that the area of the big triangle is
and the area of the little triangle is
.
. Hope this helps!
Complimentary angles do not need to be adjacent however they CAN be adjacent because its complimentary if the sum is 90 degrees