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STALIN [3.7K]
4 years ago
11

If 5 notebooks cost $5.25, how much 3 notebooks cost?

Mathematics
2 answers:
g100num [7]4 years ago
6 0
$5.25/5=$1.05
So each notebook costs $1.05
Therefore 3 would cost $3.15
frez [133]4 years ago
4 0
You divide $5.25 by 5 to see how much each notebook costs. which is $1.05 then you multiply that by 3. which is $3.15
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What is the measure of angle B in the triangle?<br><br> This triangle is not drawn to scale.
Kazeer [188]

Answer: m\angle B=70\°

Step-by-step explanation:

By definition, the sum of the interior angles of a triangle is 180 degrees.

Based on this, you need to set up the following equation:

40+(2x-30)+(x+20)=180

The next steo is to solve for "x" in order to find its value. This is:

40+2x-30+x+20=180\\\\30+3x=180\\\\3x=180-30\\\\3x=150\\\\x=\frac{150}{3}\\\\x=50

You can observe in the picture of the triangle ABC given in the exercise, that:

m\angle B=(2x-30)\°

Therefore, you must substitute the value of "x" into that equation and then evaluate, in order to find the measure of the angle B. This is:

m\angle B=(2(50)-30)\°\\\\m\angle B=(100-30)\°\\\\m\angle B=70\°

4 0
3 years ago
Write an expression for twice the sum of 16 and 9
RoseWind [281]

Answer:

(16 + 9) * 2

Step-by-step explanation:

It asks for an expression so there would be no equal sign. Since it says twice, you would multiply the value got from adding 16 and 9 by 2. Put parentheses to confirm order of operations.

6 0
3 years ago
The number of goats to the number of sheep in a field is in the ratio 5:8. Farmer Giles has 32 sheep. How many goats does he hav
Angelina_Jolie [31]
Given ratio: 5 (goats) : (to) 8 (sheep.)

The question asked that if Giles had 32 sheep, then how many goats would he have. We can figure out how many goats he would have by cross multiplying fractions.

5    z
-  x  -
8  32

To figure out the z variable, we simply cross multiply 5 and 32, which gets us 160. Now we divide it by 8. Whatever we get for z, that is our answer for goats. The answer would be <span>20.
</span>



4 0
3 years ago
Write the ratio 2.5 to 3.15 as a fraction in simplest form
Nuetrik [128]
The left  figure  that  is  2.5 is  taken   as   numerator while  the  right  figure   that  is 3.15 is  take  as  denominator.
therefore the  fraction  is
                2.5/3.15
  the multiply  by   a  100  to  remove  the  decimals  to  give
           250/315
 in  simplest  form the  fraction  is  divided  by  5 to give
            50/63
8 0
3 years ago
HEEEELP!!!!!!: An icicle is in the shape of an inverted cone with a diameter of 9 mm and a height of 120 mm. The icicle drips at
OleMash [197]

Find the volume of the icicle using the formula V = PI x r^2 x h/3

Volume = 3.14 x 4.5^2 x 120/3

Volume = 3.14 x 20.25 x 40

Volume = 2543.4 cubic mm.

Now divide the total volume by the drip rate:

2543.4 / 75 = 33.9 minutes.

The answer is D.

4 0
3 years ago
Read 2 more answers
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