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BaLLatris [955]
3 years ago
15

Find the value of the variable using these steps.

Mathematics
2 answers:
Aleks [24]3 years ago
4 0
0.4x+3.9=5.78 ⇒ subtracting 3.9 form both sides

0.4x+3.9-3.9=5.78-3.9

0.4x=1.88 ⇒ Divide both sides by 0.4

\frac{0.4x}{0.4}= \frac{1.88}{0.4}

x=4.7
Zanzabum3 years ago
4 0

He is correct just took the test 4.7!!!!!!!!!!!

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Basile [38]
B. 25

16 divided by 0.64 (the percentage as a decimal) = 25
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3 years ago
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On a sketch of a mural,3 inches represents one foot in the mural. A door in the sketch is 2 inches wide by 5 inches high. What i
grandymaker [24]

Answer:

Length of the door,                  <em> l</em> = 5 inches (<em>in</em>)

Width or Breadth of the door, <em>w</em> = 2 inches (<em>in</em>)

Perimeter                                   p = 2(l + w)

                                                   = 2( 5 + 2) <em>inches</em>

<em>                                                    = 2(5) inches + 2(4) inches</em>

                                                   = 10 <em>inches</em>  + 4 <em>inches</em>

                                                   = 14 <em>inches</em> or 14 <em>in</em>

  Step-by-step explanation:

The perimeter of a plane shape is the measurement of the length of its outside boundary, which means the distance around its edges.

The door in the sketch is the shape of a rectangle. the distance around the edge of the door is the sum of all the sides. The longer side of a rectangle is called the length and it is usually represented by letter<em> l</em> while the shorter side is known as width or breadth represented by letter <em>w</em> and<em> b </em>respectively. The perimeter is calculated by the formula 2(l + w). where l means the length and w represents the width.

4 0
3 years ago
How do you square -2square root 5 and what is the final answer?
Fofino [41]
The answer is :
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OLEGan [10]

Step-by-step explanation:

so he already down 20 ft so he ascends (goes up) 9 feet, so hes at 11 feet right now. then he descends 12 (goes down) feet so hes at 23 feet. lastly he ascends 15 feet (goes up) more. so the answer is 8

7 0
3 years ago
I don’t know how to answer this x.x
gulaghasi [49]

Answer:

2

Step-by-step explanation:

On the first side it shows 5 ones. If you add 5 by 2 it’s 7. Then on the other side it shows 3 X’s. 3x2 is 6. Plus you add that 1 which makes it 7.

Hope this Helps :)

8 0
3 years ago
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