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3 years ago

12x-13x write an equivalent expression.

Mathematics

1 answer:

harina [27]3 years ago

5 0

Answer:

-x

Step-by-step explanation:

12x-13x is -1x which can also be written as -x

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She can buy 16 pens and 16 pencils.

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2 years ago

Given the expression 7p + 5q + 4p - 2q, what is the result of combining the like terms?

s2008m [1.1K]

Answer:

11p+3q

Step-by-step explanation:

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2 years ago

Need help solving for relative frequency please!

Sunny_sXe [5.5K]

Answer:

Kindly check explanation

Step-by-step explanation:

Given :

Relative frequency = frequency / total frequency

Total frequency = 389+335+975+351+72 = 2122

Response ________ Frequency __ R/ frequency

Never ____________ 389 _ 389/2122 = 0.180

Rarely ____________ 335 _ 335/2122 = 0.158

Sometimes _________975 _975/2122 = 0.459

Most of the time _____ 351 _ 351/2122 = 0.165

Always ____________ 72 __ 72/2122 = 0.034

5 0

2 years ago

Please help me with this question im too slow to answer

kakasveta [241]

Answer:

Step-by-step explanation:

w=7

x=4

y=8

z=1

8^2 + 2(4) + 3 (7) -1

64 + 2 * 4 + 3 * 7 -1

64 + 8 + 21 - 1

72 + 20

6 0

3 years ago

Read 2 more answers

Plutonium-240 decays according to the function L where o

PIT_PIT [208]

Answer:

$\boxed{\textbf{1700 yr}}$

Step-by-step explanation:

$-\dfrac{\text{d}L}{\text{d}t} = kL\\\\\dfrac{dL}{L}=-kdt\\\\\ln L = -kt + C\\\text{At t = 0, L = L$_{0}$, so C = $\ln L_{0}$}\\\ln L = -kt + \ln L_{0}\\\ln L_{0} - \ln L = kt\\\\\ln \dfrac{L_{0}}{L} =kt$

Data:

L₀ = 24 g

L = 20 g

k = 0.000 11 yr⁻¹

Calculation:

$\ln \dfrac{24}{20} =0.000 11t\\\\\ln 1.2 = 0.000 11t\\\\0.1823 = 0.000 11t\\\\t = \dfrac{0.1823}{0.000 11} = \textbf{1700 yr}\\\\\text{It will take } \boxed{\textbf{1700 yr}}\text{ for the polonium to decay to 20 g}$

8 0

3 years ago