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2 years ago

Please help me with this Algebra question. Who ever gets everything correct will be brainliest!

Mathematics

2 answers:

77julia77 [94]2 years ago

8 0

Answer:

cherry =16

Step-by-step explanation:

and rest I don't know

Artemon [7]2 years ago

5 0

Answer:

= 16

= 17

= 30

Step-by-step explanation:

guess I helped

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Which expression represents a number n increased by 18

liraira [26]

Answer:

n+18

Step-by-step explanation:

A number n just means a variable n, and since we are increasing it (or adding to it), by 18, it is n+18

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1 year ago

What does the expression ∙ represent?

nirvana33 [79]

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2 years ago

Read 2 more answers

Will give brainliest

Galina-37 [17]

The percentage of the radioactive isotope left is 25.0000%.

The half life of a radioactive isotope is the time that will elapse before only half of the number of original isotopes will remain.

Now;

We are told that;

Half life (t1/2) = 55 days

Time taken (t) = 115 days

Ratio of isotope remaining = N/No

Thus;

N/No = (1/2)^t/t1/2

N/No = (1/2)^115/55

N/No = (1/2)^2

N/No =1/4

Hence, the percentage = 1/4 * 100/1 = 25.0000%

Learn more about half life of an isotope:brainly.com/question/16387602

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7 0

1 year ago

Plzzzzzz help I am going to fail unless I get the answer. Brainly says my answer will be answered right away I have had these up

mina [271]

Answer:

I think it's 6?

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2 years ago

Let L be the line parametrized by x = 2 + 2t, y = 3t, z = −1 − t. (a) Find a linear equation for the plane that is perpendicular

Elden [556K]

Answer:

Step-by-step explanation:

Given that L is a line parametrized by

$x = 2 + 2t, y = 3t, z = −1 − t$

The plane perpendicular to the line will have normal as this line and hence direction ratios of normal would be coefficient of t in x,y,z

i.e. (2,3,-1)

So equation of the plane would be of the form

$2x+3y-z =K$

Use the fact that the plane passes through (2,0,-1) and hence this point will satisfy this equation.

$2(2)+3(0)-(-1) =K\\K =5$

So equation is

$2x+3y-z =5$

b) Substitute general point of L in the plane to find the intersecting point

$2(2+2t)+3t-(-1-t) =5\\4+8t+1=5\\8t=0\\t=0\\(x,y,z) = (2,0,-1)$

i.e. same point given.

3 0

2 years ago