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ss7ja [257]
3 years ago
11

Please explain your answer.

Mathematics
1 answer:
Vadim26 [7]3 years ago
7 0

Answer:

12

Step-by-step explanation:

it 12

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Write a mathematical expression for: the sum of twice a number n and 20.
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3 years ago
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What is 1.2 liters - 200 milliliters
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Luba_88 [7]
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6 0
2 years ago
In the figure to the right, AE + DC = 1 1/5 cm, AB = 1 3/4 cm, DE = 1 1/4 cm, and BC = 1 3/10 cm. Find the perimeter of the figu
nasty-shy [4]

Answer:

<em>P= 5.5 cm</em>

Step-by-step explanation:

<u>The Perimeter of Plane Shapes</u>

If we are given a plane shape, the perimeter is the measurement of the boundary of it. In case the shape is made of lines, the perimeter is the sum of the lengths of all of them.

We are given an irregular shape, we only need to add all the sides. But we don't have all the individual sides. Let's write the expression for the perimeter.

P=AE+ED+DC+CB+BA

We have: AE + DC = 1 1/5 cm, AB = 1 3/4 cm, DE = 1 1/4 cm, and BC = 1 3/10 cm. Note we don't have AE or DC, but we have their sum, so

P=AE+DC+ED+CB+BA

Recall that AB=BA, the order of the letters is not important. The perimeter is

\displaystyle P=1\frac{1}{5}+1\frac{1}{4}+1\frac{3}{10}+1\frac{3}{4}

We add the integer parts separate from the fractions

\displaystyle P=4+\frac{1}{5}+\frac{1}{4}+\frac{3}{10}+\frac{3}{4}

Now we use the common denominator (Least Common Multiple or LCM ) which is 20:

\displaystyle P=4+\frac{4+5+6+15}{20}

Operating

\displaystyle P=4+\frac{30}{20}

Simplifying

\displaystyle P=4+\frac{3}{2}

\displaystyle P=\frac{11}{2}=5.5\ cm

5 0
3 years ago
Given m∠P = 38° and m∠O = 70°, find m∠1.<br><br><br>38  72  108  142
mote1985 [20]

Answer:

<h3>m∠1 = 72°</h3>

Step-by-step explanation:

We know: The sum of the measures of a triangle is 180°.

Therefore we have the equation:

m\angle P+m\angle O+m\angle 1=180^o

We have

m\angle P=38^o,\ m\angle O=70^o

Substitute:

38^o+70^o+m\angle 1=180^o

108^o+m\angle1=180^o       <em>subtract 108° from both sides</em>

m\angle1=72^o

6 0
3 years ago
Read 2 more answers
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