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svp [43]
3 years ago
7

My rule is take a number, double it, add 11, and then subtract 8.

Mathematics
2 answers:
denis23 [38]3 years ago
8 0

Answer: y=2x+2

Step-by-step explanation:

Rule as an expression: 2x+11-8

Simplify: 2x+2

Rewrite as an equation with x (input) and y (output): y=2x+2

professor190 [17]3 years ago
3 0
Y=2x+3
X= “a number”
•2
+(11-8)
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K=1/2mv squared <br> Rearrange the formula to solve for m
musickatia [10]

Answer:

<h2>m = k  / 1/2 over v</h2>

Step-by-step explanation:

1/2mv = k

rearranged can be:

m = k  / 1/2 over v

5 0
3 years ago
Please help me on 7 and 8
Nostrana [21]
What are the questions on 7 and 8?
3 0
3 years ago
Which expression represents the number 2i4−5i3+3i2+−81‾‾‾‾√ rewritten in a+bi form?
vichka [17]

Answer:

The expression -1+14i represents  the number 2i^4-5i^3+3i^2+\sqrt{-81} rewritten in a+bi form.

Step-by-step explanation:

The value of i is i=\sqrt{-1}[tex] or [tex]i^{2}=-1[\tex].Now [tex]i^{4} in term of i^{2}[\tex] can be written as, [tex]i^{4}=i^{2}\times i^{2}

Substituting the value,

i^{4}=\left(-1\right)\times \left(-1\right)

Product of two negative numbers is always positive.

\therefore i^{4}=1

Now i^{3} in term of i^{2}[\tex] can be written as, [tex]i^{3}=i^{2}\times i

Substituting the value,

i^{3}=\left(-1\right)\times i

Product of one negative  and one positive numbers is always negative.

\therefore i^{3}=-i

Now \sqrt{-81} can be written as follows,

\sqrt{-81}=\sqrt{\left(81\right)\times\left(-1\right)}

Applying radical multiplication rule,

\sqrt{ab}={\sqrt{a}}\sqrt{b}

\sqrt{\left(81\right)\times\left(-1\right)}={\sqrt{81}}\sqrt{-1}

Now, \sqrt{\left(81\right)=9 and \sqrt{-1}}=i

\therefore \sqrt{\left(81\right)\times\left(-1\right)}=9i

Now substituting the above values in given expression,

2i^4-5i^3+3i^2+\sqrt{-81}=2\left(1\right)-5\left(-i\right)+3\left(-1\right)+9i

Simplifying,

2+5i-3+9i

Collecting similar terms,

2-3+5i+9i

Combining similar terms,

-1+14i

The above expression is in the form of a+bi which is the required expression.

Hence, option number 4 is correct.

5 0
3 years ago
What is 2x^2-8x<br> factorised*
Otrada [13]

Answer:

2x(x - 4)

Step-by-step explanation:

2 {x}^{2}  - 8x \\  \\  = 2x(x - 4)

8 0
3 years ago
Can someone please answer. There is only one problem. There is a picture. Thank you!!!
Rainbow [258]
The number of permutations of the 25 letters taken 2 at a time (with repetitions) is:25^{2}
The number of permutations of the 9 digits taken 4 at a time (with repetitions) is:
9^{4}
Each permutation of letters can be taken with each permutation of digits, therefore the total number of possible passwords is:
25^{2}\times 9^{4}=4,100,625

6 0
3 years ago
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