3 years ago

(7w+4h)+ 5(2w+3h)- 2(w+h)

2 answers:

4 0

(7w+4h)+5(2w+3h)-2(w+h)
(7w+4h)+10w+15h-2w-2h
7w+10w-2w+4h+15h-2h
15w+19h

3 0

7w + 4h + 10w + 15h - 2w - 2h
= 15w + 17h

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OLga [1]

If the length of the ladder is x then 12/x=cos70, so x=12/cos70=35’ approx, answer c.

7 0

3 years ago

ch4aika [34]

Answer:

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>

<h3>let's solve:</h3>

since y is equal to both equation therefore we can substitute the value of y into the other equation

$\sf substitute \: the \: value \: of \: y : \\ \sf - x + 2 = 3x - 4$
$\sf add \: x \: to \: both \: sides : \\ \sf - x + x + 2 = 3x + x - 4 \\ \sf 4x - 4 = 2$
$\sf add \: 4 \: to \: both \: sides : \\ \sf xx - 4 + 4 = 2 + 4 \\ 4x = 6$
$\sf divide \: both \: sides \: by \: 4 : \\ \frac{4x}{4} = \frac{6}{4} \\ x = \frac{3}{2}$