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2 years ago

Illmark brainlist please help

Mathematics

2 answers:

VMariaS [17]2 years ago

7 0

Step-by-step explanation: If we are picking the ones down there then one answer that would be the same is 8 : 3 and 48 : 18.

Sedbober [7]2 years ago

6 0

Option b ... it’s equivalent as the 8:3 and 48:18 , both are divisible by 24 and 9

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Please Help!!

Genrish500 [490]

Given

$a\sqrt{x+b}+c=d$

we have

$\sqrt{x+b}=\dfrac{d-c}{a}$

Squaring both sides, we have

$x+b=\dfrac{(d-c)^2}{a^2}$

And finally

$x=\dfrac{(d-c)^2}{a^2}-b$

Note that, when we square both sides, we have to assume that

$\dfrac{d-c}{a}>0$

because we're assuming that this fraction equals a square root, which is positive.

So, if that fraction is positive you'll actually have roots: choose

$a=1,\ b=0,\ c=2,\ d=6$

and you'll have

$\sqrt{x}+2=6 \iff \sqrt{x}=4 \iff x=16$

Which is a valid solution. If, instead, the fraction is negative, you'll have extraneous roots: choose

$a=1,\ b=0,\ c=10,\ d=4$

and you'll have

$\sqrt{x}+10=4 \iff \sqrt{x}=-6$

Squaring both sides (and here's the mistake!!) you'd have

$x=36$

which is not a solution for the equation, if we plug it in we have

$\sqrt{x}+10=4 \implies \sqrt{36}+10=4 \implies 6+10=4$

Which is clearly false

7 0

2 years ago

Henry is an avid reader.He devours 90 pages in half-an-hour.How many pages has Henry read per minute?

ICE Princess25 [194]

Answer:

3 pages per minute

Step-by-step explanation:

Half an hour is eqquivalent to 30 minutes, so we do 90 (pages) / 30 (minutes) = 3--> Wich means that Henry can read 3 pages per minute.

4 0

2 years ago

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At the Dessert Island Pastry Cafe, there are 2 cakes for every 7 donuts and 11 brownies for every 3 cakes. What is the ratio of

Westkost [7]

Answer: 22/21

Step-by-step explanation:

2 cakes : 7 donuts → 6 cakes : 21 donuts

3 cakes : 11 brownies → 6 cakes : 22 brownies

22 brownies : 21 donuts

Now, simply write this as a fraction. 22/21

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2 years ago

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59.9338a+58.9332(0.031720577-a)=1.8712 solve for a

dimaraw [331]

Answer:

what is this asking???

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2 years ago

Subtracting integers -4 - (-5)

malfutka [58]

Answer:

the answer is 1

Step-by-step explanation:

the answer is 1

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