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2 years ago

How do you do this?? I don’t understand at all

Mathematics

2 answers:

AlladinOne [14]2 years ago

7 0

X=5 becuase if 7*3=21 then x*3=15 and 5 times 3 = 15

So the answer is 12

Rus_ich [418]2 years ago

4 0

so i believe that 21 shrinks down to 7 and then you find what multiplication can make 7 to 21 and the answer is 3 because of 7*3=21

then you do the same to the other side which is 15 but instead you divide by 3 which gives you 5 so

x=5

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2 years ago

I cannot find the answer on my own, I need a lil' bit of help.

viktelen [127]

for any fraction a/b, the decimal format of it is just a ÷ b.

is the number rational?

well, a rational number is one we can write as a ration or fraction, well clearly is a fraction so it is rational.

can it be written as a repeating/recurring decimal? well, 9/20 is 0.45, so -9/20 is -0.45, no repeating decimal like 0.454545......... , just a plain vanilla -0.45, so nope.

is it less than -0.4?

well, let's recall that for the negative side on the number line, the closer to 0, the larger the number, so then -1,000,000 is much smaller than -1, because -1 is closer to 0.

who is closer -0.4 or -0.45?

|--------------------- -0.45 -------- -0.40 ------------------- 0 --------------- 1 -------------------|

so, -0.45 is farther from 0, and therefore is smaller than -0.4, so yes.

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3 years ago

I need help pls thank you and I'll send better pics

kakasveta [241]

$\begin{gathered} c)\text{ output = (input}\times\text{ input) }+\text{ 1} \\ d)\text{ output = input + 5} \end{gathered}$

Explanation:

$\begin{gathered} c)\text{ Change in input = 4 - 3 , 3 - 2, 2 -1 } \\ \text{change in input = 1 (it is constant )} \\ \text{The output depends on the input.} \end{gathered}$ $\begin{gathered} To\text{ get output 2: (1 }\times1\text{ )+ 1 = 1 +1 = 2} \\ To\text{ get output 5: (2}\times2)\text{ + 1 = 4 + 1 = 5} \\ To\text{ get output 10: (3}\times3)\text{ + 1 = 9 + 1 = 10} \\ To\text{ get output 17: (4}\times4)\text{ + 1 = 16 + 1 = 17} \\ To\text{ get output 26: (5}\times5)\text{ + 1 = 25 + 1 = 26} \end{gathered}$ $\begin{gathered} \text{Formula for the Process = (input}\times\text{ input) }+\text{ 1} \\ Process=(input)^2\text{ }+\text{ 1} \\ \text{output = (input}\times\text{ input) }+\text{ 1} \end{gathered}$

$\begin{gathered} d)\text{ rate of change = }\frac{change\text{ in output }}{\text{change in input}} \\ \text{rate of change = }\frac{-5-(-15)}{0-(-2)}\text{ = }\frac{10-(-5)}{3-0}\text{ = }\frac{15-10}{4-3} \\ \text{rate of change = }\frac{10}{2}\text{ = }\frac{15}{3}=\frac{5}{1} \\ \text{rate of change = 5} \end{gathered}$ $\text{output = input + 5}$

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8 months ago

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alex41 [277]

Answer:

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because you half the 18

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2 years ago

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Misha Larkins [42]

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