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lilavasa [31]
3 years ago
10

What is 3x5 , answer is

Mathematics
1 answer:
dlinn [17]3 years ago
7 0

Answer:15

Step-by-step explanation:

You might be interested in
Solve the equation 2^(2x+1)+8=17×2^x.
myrzilka [38]
Oooh, looks fun

ok
erm
we might want to know some properties
(x^m)(x^n)=x^{m+n}
(a^b)^c=a^{bc}
if a^m=a^n where a=a, then assume m=n

2^{2x+1}=(2^{2x})(2^1)
so
(2^{2x})(2)+8=17(2^x)
(2^{2x})(2)+2^3=17(2^x)
(2^x)^2(2)+2^3=17(2^x)
minus 17*2^x both sides
(2^x)^2(2)+2^3-17(2^x)=0
use u subsitution, u=2ˣ
(u)^2(2)+2^3-17(u)=0
solve 2u^2+8-17u=0
or
2u^2-17u+8=0
ac method
2 times 8=16
what 2 number multiply to get -17 and add to get 16
-16 and -1
2u²-1u-16u+8=0
(2u²-1u)+(-16u+8)=0
u(2u-1)+(-8)(2u-1)=0
(u-8)(2u-1)+0
u-8=0
u=8

2u-1=0
2u=1
u=1/2

now
u=2ˣ

8=2ˣ
2^3=2^x
3=x

and
\frac{1}{2}=2^x
2^{-1}=2^x
-1=x

x=-1 and 3
neat problem
8 0
3 years ago
When one card is drawn from a well shuffled deck of 52 cards what is the probability that it will be a queen king or ace
andreev551 [17]

There are 4 Queens, 4 Kings, and 4 Aces in a standard deck of cards.

Add these together, and there are 12 cards that you have a chance of choosing from.

The ratio of cards we want to get (queen, king ace) to number of cards is 12/52. This is the probability. We can simplify it further by dividing both sides by 4. We now have the fraction 3/13.

Therefore, the probability of drawing a queen, king, or ace is 3 in 13, or 23%.

hope this helped!

6 0
2 years ago
Huilan's age is two times Thomas's age. The sum of their ages is 57. What is Thomas's age?
Anni [7]

Answer:

Thomas is 19 years old

Step-by-step explanation:

Thomas's age is T

Huilan is 2 times Thomas's age or 2T

the sum of both ages is 57

That means T + 2T = 57

3T = 57

T = 57/3

T = 19

Since T is Thomas's age, Thomas is 19 years old

Huilan is 38 years old

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

4 0
3 years ago
Read 2 more answers
Compare and Contrast: Below are two equations. Solve each equation and compare the two solutions. Choose the statement that is t
grin007 [14]
Equation #1:
|2x - 3| = 17
The first solution is
2x - 3 = 17
2x = 17 + 3 = 20
x = 10
The second solution is
3 - 2x = 17
-2x = 17 - 3 = 14
x = -7
The solutions are x = 10 or x = -7.

Equation #2:
|5x + 3| = 12
The only solution is
5x + 3 = 12
5x = 12 - 3 = 9
x = 9/5

Let us examine the given answers.
a. Equation #1 and #2 have the same number of solutions.
    FALSE
b. Equation @1 has more solutions than Equation #2.
    TRUE
c. Equation #1 has fewer solutions than equation #2.
    FALSE
d. None of the statements a,b, or c apply.
    FALSE

Answer: b.

5 0
3 years ago
Emily read 20% of her book containing 575 pages. What page is she going to read next?
zlopas [31]

Answer:

She is on page 115 and will read page 116 next

Step-by-step explanation:

575 x .2

115

5 0
3 years ago
Read 2 more answers
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