The answer would be -4 because if you do -4 times 2x then you would get -8x. Then if you did -4 times -3 you would get 12. (A negative times a negative equals a positive)
Answer:
Yes, you can square a negative number. In fact, any number at all can be squared, even numbers like pi and 0. This is because to square a number just means to multiply it by itself. ... Note that this is positive because when you multiply two negative numbers you get a positive result.
Step-by-step explanation:
number 2
The problem statement tells us that
- AM ≅ MB, ∴ ΔAMB is isosceles
- AM ≅ MC, ∴ ΔAMC is isosceles
Base angles of an isosceles triangle are equal, so ∠MAB ≅ ∠MBA. ∠AMC is the exterior angle opposite those two, so it is equal to their sum, 2∠MAB.
The base angles in isosceles ΔAMC are equal to half the difference between the apex angle, ∠AMC, and 180°. That is,
... ∠MAC = (1/2)(180° -∠AMC) = (1/2)(180° -2∠MAB) = 90° -∠MAB
The angle at A of ΔABC is the sum of the two angles created by the median AM. That is ...
∠A = ∠MAC + ∠MAB
∠A = (90° -∠MAB) +∠MAB
∠A = 90°
_____
Maybe a shorter way to get there is to realize that ...
... MA ≅ MB ≅ MC
so M is the center of a circle with BC as a diameter and A a point on the circle. Angle BAC is inscribed in the semicircle and subtends an arc of 180°, so angle A is 90°.
Answer:
Wind speed = 159.6 miles per hour.
Step-by-step explanation:
The distance is the same so some sort of basic equation can be made.
Givens
From A to B
t = 4 hours
v = p + w
d = 1064
===========
From B to A
t1 = 7 hours
v = p - w
d = 1064
Equation
t * (p + w) = t1 * ( p - w)
Solution
4(p + w) = 7(p - w)
4p + 4w = 7 p - 7w
<em>Add 7w to both sides</em>.
4p + 4w + 7w = 7p
4p + 11w = 7p
<em>Subtract 4p from both sides</em>
11w = 7p - 4p
11w = 3p
<em>Divide by 3</em>
p = 11w/3
====================
4P + 4W = 1064
11w/3 + 3W = 1064
w(3.6667 + 3) = 1064
W*6.666667 = 1064
W = 1064 / 6.666667
W = 159.6 mph
Ok all you got to do is divide so that all the numbers will be decimals
hope i helped
