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brilliants [131]
3 years ago
12

Pls help math!! :(!!!!

Mathematics
1 answer:
sergij07 [2.7K]3 years ago
6 0

Answer:

i cant see the image so i cant help sorry

Step-by-step explanation:

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Ali simplifies the expression 9y+y9y+y to 9y29y2. Use the drop-down menus to complete the statements below to explain why Ali's
AleksandrR [38]
I say she is incorrect because the equation 9y+y9y+y should equal 19y if I am correct.  I am sorry if im not correct but i believe she is incorrect 
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3 years ago
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How many terms are in the expansion (a + b)20
Pavel [41]

Answer:

21 terms

Step-by-step explanation:

Number of terms = Exponent + 1 = 20 +1 = 21

5 0
3 years ago
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Find the next three terms of the sequence 2000,200,20,...and write the term to term rule.
LUCKY_DIMON [66]

Answer:

2, 0.2, 0.02

The first number is 2000.  The term to term rule is 'divide by 10'.

Step-by-step explanation:

To calculate the next term, divide the previous term by 10:

2000 ÷ 10 = 200

200 ÷ 10 = 20

Therefore, the next three terms will be:

20 ÷ 10 = 2

2 ÷ 10 = 0.2

2 ÷ 10 = 0.02

<u>Term to term rule</u>

To work out the term to term rule, give the initial number of the sequence and then describe the pattern:

The first number is 2000.  The term to term rule is 'divide by 10'.

6 0
3 years ago
Using the quadratic formula to solve 2x^2 = 4x – 7, what are the values of x?
LekaFEV [45]

For this case we have the following quadratic equation:

2x ^ 2 = 4x - 7

Rewriting the equation we have:

2x ^ 2 - 4x + 7 = 0

From here, we have:

a=2 b = -4c = 7

Substituting values in the quadratic equation we have:

x = \frac{-b+/-\sqrt{b^2-4ac}}{2a}

x = \frac{-(-4)+/-\sqrt{(-4)^2-4(2)(7)}}{2(2)}

Rewriting the equation we have:

x = \frac{4+/-\sqrt{16-56}}{4}

x = \frac{4+/-\sqrt{-40}}{4}

x = \frac{4+/-\sqrt{-4*10}}{4}

x = \frac{4+/-2i\sqrt{*10}}{4}

x = \frac{2+/-i\sqrt{*10}}{2}

Answer:

The values of x are given by:

x = \frac{2+i\sqrt{*10}}{2}

x = \frac{2-i\sqrt{*10}}{2}

3 0
3 years ago
Read 2 more answers
Two containers, X and Y, are each filled by an ideal gas at the same temperature. The volume of Y is half the volume of X. The n
-Dominant- [34]

Answer:

The answer to the question is

The ratio of the two gas pressures   \frac{P_{x} }{P_{y} } , that is Px to Py = 1/6

Step-by-step explanation:

Let the gases Volumes be V₁ and V₂

Where volume of X = V₁ and

volume of Y = V₂

The volume of Y is half the volume of X

∴ V₂  =  \frac{1}{2} × V₁

Let the number of moles be n₁ and n₂ in X and Y respectively

therefore  n₂ = 3 × n₁

The pressure of the gas in X is Pₓ and the pressure of the gas in Y is  P_{y} then we have

P₁ × V₁  = n₁ × R × T₁ , and P₂ × V₂ = n₂ × R × T₂

(P₁ × V₁)/(n₁ × T₁) = (P₂ × V₂)/(n₂ × T₂)

but T₁ = T₂

Therefore

(P₁ × V₁)/n₁ = (P₂ × V₂)/n₂.  However  n₂ = 3 × n₁  and V₂  =  \frac{1}{2} × V₁ therefore substituting in the equation we have

(P₁ × V₁)/n₁ = (P₂ ×  \frac{1}{2} × V₁ )/(3 × n₁) from where

P₁ /P₂ =  (\frac{1}{2} × V₁ × n₁)/(V₁×3 × n₁) =0.5/3 = 1/6

The ratio of \frac{P_{x} }{P_{y} } = 1/6

6 0
4 years ago
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