Obtuse angles are more than 90° and less than 180°
The expression -4 (-11 + 4n) – 3(- 2n + 9) is equivalent to the expression 17 — 10n.
<h3>What is an equivalent expression?</h3>
The equivalent is the expressions that are in different forms but are equal to the same value.
The expression is given below.
⇒ -4 (-11 + 4n) – 3(- 2n + 9)
On simplifying, we have
⇒ 44 – 16n + 6n – 27
⇒ 17 — 10n
More about the equivalent link is given below.
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These triangles are either 45 45 90 triangles or 30 60 90 triangles
For the 45 45 90 triangles the smaller sides are
s and the large one is s times the square root of two
For 30 60 90 the smallest side is s the hypotenuse is 2s and the last one is s root 3
For example 1. X is 7 the hypotenuse is 14
The sides on 2 are 6 Times Square root of 2
3. The sides are 3 each
Answer:
more info
Step-by-step explanation:
Answer:
rate of motorboat: b
rate of current: c
So the rate the boat travels upstream is $b - c$, and the rate it travels downstream is $b + c$
Step-by-step explanation:
d = rt
200 = (b - c)\cdot 5
200 = (b + c)\cdot 4
b - c = 40
b + c = 50
Adding these equations, we get:
2b = 90
b = 45
So
c = 50 - 45 = 5
<u>Therefore the rate of the boat is 45kph, and the rate of the current is 5kph</u>
Hope this helps :)
