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DENIUS [597]
3 years ago
12

Find the area of the rectangle with: l=3m50cm b=2m20cm​

Mathematics
1 answer:
SashulF [63]3 years ago
4 0
You have to convert cm to m or m to cm (all if them need to have the same unit)
50cm= 0.5m
20cm= 0.2m

l=3+0.5= 3.5m
b=2+0.2= 2.2m

A=(3.5)(2.2)= 7.7m^2
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PLS HELP!<br>0.99 is what percent of 9.90?
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Answer:

10%

Step-by-step explanation:

first let's write out the problem

0.99 is what percent of 9.90     =        0.99=9.90*x

We need to   what c is so we would do the opposite operation of multiplication, division so we get,

0.99/9.90= .1

now we turn .1 into  percent and get out answer

0.1= 10%

3 0
3 years ago
Read 2 more answers
Find the third degree polynomial function that has an output of 40 when x=1, and has zeros −19 and −i?
Yanka [14]

Answer:

f(x) = (x + 19)(x^2 + 1)

Step-by-step explanation:

Complex numbers:

The following relation is important for complex numbers:

i^2 = -1

Zeros of a function:

Given a polynomial f(x), this polynomial has roots x_{1}, x_{2}, x_{n} such that it can be written as: a(x - x_{1})*(x - x_{2})*...*(x-x_n), in which a is the leading coefficient.

Has zeros −19 and −i

If -i is a zero, its conjugate i is also a zero. So

f(x) = a(x - (-19))(x - (-i))(x - i) = a(x+19)(x+i)(x-i) = a(x+19)(x^2 - i^2) = a(x + 19)(x^2 + 1)

Output of 40 when x=1

This means that when x = 1, f(x) = 40. We use this to find the leading coefficient a. So

f(x) = a(x + 19)(x^2 + 1)

40 = a(20)(2)

40a = 40

a = 1

The polynomial is:

f(x) = (x + 19)(x^2 + 1)

3 0
3 years ago
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dybincka [34]

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Step-by-step explanation:

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