3 years ago

If (2a−1)4 = 16 then a =

Mathematics

1 answer:

klemol [59]3 years ago

8 0

Answer:

a=5/2 a=2.5

Step-by-step explanation:

isolate the variable by dividing each side by factors that don't contain the variable.

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A triangle has sides of 2,3 and 4 using the law of cosines , a^2+b^2-2abcosC=c^2 what is the value of 2abcosC

Anna007 [38]

$\bf \textit{Law of Cosines}\\ \quad \\
c^2 = {{ a}}^2+{{ b}}^2-(2{{ a}}{{ b}})cos(C)\qquad 
\begin{cases}
a=2\\
b=3\\
c=4
\end{cases}
\\\\\\
4^2=2^2+3^2-2abcos(C)\implies 2abcos(C)=2^2+3^2-4^2$

7 0

3 years ago

Janet has 3 sweatshirts, 5 t-shirts, and 2 pairs of pants that can be worn together. If each outfit has a sweatshirt, t-shirt, a

RideAnS [48]

Answer:

30 outfits

Step-by-step explanation:

First, come up with all the possibilties for one of the sweatshirts. So...

S11

S12

S21

S22

S31

S32

S41

S42

S51

S52

Count up all of those and then multiply it by three

10 * 3 = 30

Have a wonderful day!

4 0

3 years ago

The temperature changed at a rate of -3 degrees per hour. How long did it take for the temperature change to be -18

DIA [1.3K]

Answer:

6 Hours

Step-by-step explanation:

If the rate is -3, that means there is an hourly change of 3 degrees. To get to 18, you must divide 18 by 3.

18÷3=6

4 0

3 years ago

You have an object with a mass of 5 kg. If it has a velocity of 4.7 m/s, what distance will the object travel if 98 newtons are

professor190 [17]

69,420 ------------------------------------------------------------------------

6 0

2 years ago

Write the equation in standard form for the cricle with center (-2,4) and radius 9

Shtirlitz [24]

Answer:

( x +2)² + ( y - 4)² = 81

Step-by-step explanation:

The equation for a circle in standard form is ( x – h)² + ( y - k)² = r², where the center is (h, k) and the radius is r.

Putting the question's given information into the formula gives you

[ x – (-2)]² + ( y - 4)² = (9)²

( x + 2)² + ( y - 4)² = 81

6 0

3 years ago