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PIT_PIT [208]
3 years ago
12

Help plz this hard i really need help

Mathematics
1 answer:
Assoli18 [71]3 years ago
8 0

With all questions???

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-3Ixl + 2x - 1, if x = -5<br><br> I don't get these types of problems :/
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Draw a diagram using positive an negative tiles for this equation:<br> -5-(-7)=2
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I got that E is 43. Is that right?
never [62]

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3 years ago
In parallelogram DEFG, DH = x + 3, HF = 3y, GH = 2x – 5, and HE = 5y + 2. Find the values of x and y.
eimsori [14]
Since DH=HF you set x+3=3y 
<span>GH=HE so 4x-5=2y+3 </span>

<span>This gives you a system and I solved by substitution so I got x alone in the first equation-> x=3y-3 </span>
<span>then I plugged this x into the second equation so </span>

<span>4(3y-3)-5=2y+3 </span>
<span>12y-12-5=2y+3 </span>
<span>12y-17=2y+3 </span>
<span>10y=20 </span>
<span>y=2 </span>

<span>plug y into the first equation to find x </span>
<span>x=3(2)-3 </span>
<span>x=6-3 </span>
<span>x=3 </span>

<span>c. x=3, y=2</span>
3 0
3 years ago
c) Chairs are placed in equal rows and column of a squared room. If there are 144 chairs in the room, how many chairs are there
Alexeev081 [22]

Answer:

12

Step-by-step explanation:

144 chairs in total.

the room is square, this means that the number must be multiplied by the same number

12x12= 144

there are 12 chairs on the first row.

4 0
3 years ago
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