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Delvig [45]
3 years ago
15

Could you show it step by step please and thank you

Mathematics
1 answer:
m_a_m_a [10]3 years ago
8 0
1.To find the triangle area is base x height : 4.33 x 5=21.65
Perimeter : 5+5+5=15

2. 6•3=18+(3•2)=18+6=24=area
16=perimeter

3. Not sure

4. 12•17=204=area
Perimeter : 13+17+17=47

Hoped I helped!
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0.8y+0.25= -0.4<br><br> Solve for y
disa [49]

Answer:

y = -13/16

Step-by-step explanation:

<u>Given:</u>

0.8y+0.25= -0.4

<u>To Find:</u>

Solve for y

<u>Solution:</u>

Multiply both sides by 100

0.8y\cdot \:100+0.25\cdot \:100=-0.4\cdot \:100

Simplify

80y+25=-40

Subtract 25 from both sides

80y+25-25=-40-25

Simplify

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Divide both sides by 80

\frac{80y}{80}=\frac{-65}{80}

Simplify

y=-\frac{13}{16}

Thus, y = -13/16

or in decimal form it equal y = -0.8125

<u><em>~Lenvy~</em></u>

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2 years ago
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galina1969 [7]

Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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