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murzikaleks [220]
3 years ago
13

Can someone help me with these 3 questions. Sorry for the annoyance.

Mathematics
2 answers:
erastova [34]3 years ago
4 0

Answer:

the first one is 37

the second one is 36

the third one is 27

Step-by-step explanation:

Gala2k [10]3 years ago
3 0
X=4 means the variable is 4!

4(2)= 8 + 15


2. 27
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The graph of y=f(x) is shown below.which point could be used to find f(3).
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Write 3.08 × 10-5 as an ordinary number.
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0.0000308

Step-by-step explanation:

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A fraction is shown 5/9 which number equivalent to the fraction
Alexandra [31]

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10/18 or 25/45

Step-by-step explanation

<h2></h2>
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2 years ago
Solve the equation by completing the square m^2+6m-77=-5
Grace [21]
Maybe you thought about this:
m^2+6m-77+5=0 => m^2+6m-72=0 => m^2+ 2*3*m+3^2-3^2-72=0
=> m^2+2*3*x+3^2= (m+3)^2 this is the complete square of the binomial, we will still keep it =>
(m+3)^2 -9 -72=0 => (m+3)^2 - 81 = 0 => (m+3)^2 - 9^2 = 0
Now we got the difference squares, it mean a^2 - b^2 = (a-b) (a+b)
In according to this => (m+3-9) (m+3+9) = 0 =>
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Are you satisfied with this solution?

6 0
3 years ago
Length of a rectangle is 5 cm longer than the width. Four squares are constructed outside the rectangle such that each of the sq
azamat

Answer:

The perimeter of rectangle is 18\ cm

Step-by-step explanation:

Let

x-----> the length of the rectangle

y----> the width of the rectangle

we know that

x=y+5 ----> equation A

120=xy+2x^{2}+2y^{2} ---> equation B (area of the constructed figure)

substitute the equation A in equation B

120=(y+5)y+2(y+5)^{2}+2y^{2}

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using a graphing calculator -----> solve the quadratic equation

The solution is

y=2\ cm

Find the value of x

x=y+5 ----> x=2+5=7\ cm

Find the perimeter of rectangle

P=2(x+y)=2(7+2)=18\ cm

8 0
3 years ago
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