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2 years ago

Which pair of expressions are equivalent?

Mathematics

1 answer:

Zielflug [23.3K]2 years ago

4 0

Answer:

second one

Step-by-step explanation:

Because when you try to remove the brackets then you should multiply coefficient of x and coefficient of y by 2

So it will be 2x+18y

2*9=18

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1] If 221ₓ= 25₁₀ find X<br> 2] if 3ₓ + 34ₓ - 40ₓ = 0 find x<br> 3] if 23ₓ = 1111₂ find x

Olin [163]

$2\cdot x^2+2\cdot x^1+1\cdot x^0=25\\2x^2+2x+1=25\\2x^2+2x-24=0\\x^2+x-12=0\\x^2+4x-3x-12=0\\x(x+4)-3(x+4)=0\\(x-3)(x+4)=0\\x=3 \vee x=-4$

The base can't be negative, therefore $x=3$ .

$3\cdot x^0+3\cdot x^1+4\cdot x^0-4\cdot x^1+0\cdot x^0=0\\3+3x+4-4x=0\\x=7$

$2\cdot x^1+3\cdotx^0=1\cdot 2^3+1\cdot2^2+1\cdot2^1+1\cdot2^0\\2x+1=8+4+2+1\\2x=14\\x=7$

5 0

1 year ago

What is 7/10 divided by 3/10

Aleksandr [31]

Answer:

2 1/3

Step-by-step explanation:

6 0

3 years ago

-8,-1,6,13 what the next three numbers

kobusy [5.1K]

20,27,34

The common difference is 7

7 0

3 years ago

Read 2 more answers

PLS HELP WILL GIVE BRAINLIEST

wlad13 [49]

Answer:

32 percent

Step-by-step explanation:

8,000×400÷100

7 0

2 years ago

What is the green dot on the parabola called

suter [353]

Answer:

Maximum

Step-by-step explanation:

The green dot repesents the max height of the parabola.

Helpful tip:

If the graph opens up then the vertex is a min

If the graph opens down then the vertex is a max

7 0

3 years ago