3x+4y=5
2x+3y=

-2(3x+4y)=5(-2)
3(2x+3y)=4(3)

-6x-8y=(-10)
6x+9y=12

Add the equations

-6x-8y=(-10)
+ 6x+9y=12
-----------------
0x+y=2
y=2

Substitue y into an equation

6x+9(2)=12
6x+18=12
6x=-6
x = -1
y = 2

5 0

3 years ago

2 to the power of 6 divided by 2?

umka21 [38]

The answer is 64
2x2=4
4x2=8
8x2=16
16x2=36
36x2=64
64x2=128
128 divided by 2
64

7 0

3 years ago

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(-2ab^-5)(4a^-2b)^-2

enyata [817]

Answer:

-a^5/(8b^7)

Step-by-step explanation:

The applicable rules of exponents are ...

(a^b)(a^c) = a^(b+c)

(a^b)^c = a^(bc)

a^-b = 1/a^b

$(-2ab^{-5})(4a^{-2}b)^{-2}=(-2ab^{-5})(4^{-2}a^{-2(-2)}b^{-2})\\\\=\dfrac{-2}{16}a^{1+4}b^{-5-2}=\boxed{-\dfrac{a^5}{8b^7}}$

4 0

3 years ago

Is 3 yards greater than less than or equal to 21 feet

Agata [3.3K]

Since a yard is 3 feet, then 3 times 3 is 9 and that is less than 21.

3 0

3 years ago

Read 2 more answers