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zhenek [66]
3 years ago
8

Bx - ay = 2 ax + by = 3

Mathematics
1 answer:
ohaa [14]3 years ago
8 0
Hope it will help you!

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Given that y= 2* (power of X)
svetoff [14.1K]
A)
y=2^x

4^x=2^(2x)=y²

solution:
y=2^x hence y²=4^x

chek:
x=5 ⇒ y=2⁵=32
4⁵=1024
y₂=32²=1024

b)
 8(4^x)-9(2^x)+1=0
8(2^(2x)-9(2^x)+1=0

2^x=t

8t²-9t+1=0
We solve the quadratic.
t₁=1/8    ⇒2^x=1/8
2^x=1/2³
2^x=2⁻³
x=-3

t₂=1  ⇒ 2^x=1  ⇒x=0

Solutions:
x=-3
x=0

5 0
3 years ago
Evaluate 9+(-8)÷4+5(-2)-(-3)​
dimaraw [331]

Answer:

hi there

0

Step-by-step explanation

9+[(-8)÷4]+[5(-2)]-(-3)

9+[-2]+-10+3

7+-7

0

7 0
3 years ago
Read 2 more answers
Which one is it? Plz help
Bezzdna [24]

Multiplication and division with the powers of ten

So, when multiply powers of ten, all you have to do add up the powers.

The reverse goes when you are dividing. You would subtract the powers.

9 x 10^7                    =>   3 x 10^3

The words " how many times as large as " indicates that we are going to divide the two, making it look like this:

\frac{(9)(10^{7}) }{(3)(10^{3}) }

Divide the 9 by 3 you get 3

Then subtract 10^3 from 10^7

Therefore, the answer is 3 x 10^4, or A

6 0
3 years ago
Pleas please help me with my math problem! Thank You :)
dalvyx [7]

Check the picture below.

as you recall from the previous exercise, x = 74°, now, using the "inscribed angle theorem" as you saw already, the green intercepted arc is 160°, so y = 160° - 74°.

as far as ∡z, well, we can just use the "inscribed quadrilateral conjecture".

3 0
3 years ago
Is a mixed number a ration number? Explain.
andre [41]
Any number that can be rewritten as a simple fraction is a rational number. This means that natural numbers, whole numbers and integers, like 5, are all part of the set of rational numbers as well because they can be written as fractions, as are mixed numbers like 1
8 0
3 years ago
Read 2 more answers
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