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Elanso [62]
3 years ago
9

there are 480 students in a class. the ratio of boys to girls is 1:3. How many students are girls in the class?

Mathematics
1 answer:
vodka [1.7K]3 years ago
8 0

Answer:360

Step-by-step explanation:

3+1=4

480 divided by 4= 120

120x1=120 so there are 120 boys

120x3=360 so there are 360 girls

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Exponential Function:
vovangra [49]

Answer:

See below

Step-by-step explanation:

<em>On the graphs we see transformations of exponential functions</em>

<h3>Graphic 1 = Horizontal shift </h3>
  • f(x) = 2ˣ is the parent function
  • g(x) = 2ˣ⁺³ indicates shift to the left by 3 units
  • h(x) = 2ˣ⁻¹ indicates the shift to the right by 1 unit
<h3>Graphic 2 =Vertical shift</h3>
  • p(x) = (1/3)ˣ is the parent function
  • r(x) = (1/3)ˣ⁺³ indicates shift up by 3 units
  • q(x) = (1/3)ˣ⁻² indicates the shift down by 2 units

4 0
4 years ago
Jamaican sprinter Usain Bolt 100 m sprint gold medal in the 2012 Summer Olympics Iran the hundred meter race and 9.63 seconds th
Serggg [28]

Answer: 23.2 miles per hour

Step-by-step explanation:

He ran 100 meters in 9.63 seconds.

First convert the number of meters he ran to miles:

= 100 * 3.28

= 328 feet

= 328/5,280

= 0.062121212 miles

Convert the seconds to hours:

= 9.63 / 60

= ‭0.1605‬ minutes

= ‭0.1605‬/60

= ‭0.002675‬ hours

Speed in miles per hour is:

=  0.062121212 / ‭0.002675

= 23.22

= 23.2 miles per hour

4 0
3 years ago
What is the product of (x + 1)/(b2x2 + b2) and b2/(x + 1) expressed in simplest form? A) 1/(x2 + 1) B) x2 + 1 C) b2/(x2 + 1) D)
zhannawk [14.2K]
The answer is A<span>) 1/(x2 + 1) </span>
8 0
4 years ago
Based on the information marked in the diagram, ABC and DEF must be congruent.
drek231 [11]

Answer:

Option A is correct

True, ΔABC and ΔDEF must be congruent.

Explanation:

LA theorem or Postulates states that given two right triangles,  where one acute angle and a leg of one of the triangles are congruent to  an angle and a leg of the other triangle, then the two triangles are congruent.

In  ΔABC and ΔDEF

AB = DE              [Leg]                [Given in the figure]

\angle BAC = \angle EDF = 90^{\circ}     [Given]

\angle BCA = \angle EFD   [Acute angle]        [Given in the figure]

Then, by the LA theorem or Postulates;

therefore, ΔABC \cong ΔDEF .





3 0
4 years ago
Read 2 more answers
(3 · x ) · 7 <br><br> what is the simplified answer to this question?
Leno4ka [110]

Answer:

21x

Step-by-step explanation:

In the parentheses, 3 * x is the same thing as 3x.  Distribute 7 into 3x to get 21x as your final answer.

8 0
3 years ago
Read 2 more answers
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