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REY [17]
3 years ago
13

The ages of sunitha and raseeda are in ratio of 7:8 ten years from now there ages will be 9:10 find there present age

Mathematics
1 answer:
Pachacha [2.7K]3 years ago
7 0

Answer:

  • Sunitha: 35
  • Raseeda: 40

Step-by-step explanation:

Both numbers of the ratio units used to express the ratio in ten years are 2 higher than at present. Thus, each ratio unit must stand for 5 years. That would make their current ages ...

  Sunitha: 7·5 = 35

  Raseeda: 8·5 = 40

_____

If you can't figure the answer right away from the change in ratio units, then you may need to write a couple of equations:

  • s/r = 7/8
  • (s+10)/(r+10) = 9/10

These can be translated to standard form, which may make some methods of solution easier:

  • 7r -8s = 0
  • 9r -10s = 10

These have solution (r, s) = (40, 35).

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3 years ago
A map has a scale of 3 cm and 20 cm which statement is true or false two cities are actually 66 cm part are9.9 cm part
victus00 [196]
Answer:
Answer options
A. Two cities that are 7.5 cm apart on the map are actually 50 km apart.
D. Two cities that are actually 66 km apart are 9.9 cm apart on the map.
Step-by-step explanation:
Step 1
Indicate the scale as shown;
3 cm : 20 km, meaning 3 cm on the map represents 20 km on the ground
A). what does 7.5 cm represent on the ground
Distance on ground=(7.5×20)/3=50 km
B). what does 4 cm represent on the ground
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8 0
3 years ago
Which expression shows the correct multiplication of the following polynomilas? 3x(6x^2-3x+7)
snow_tiger [21]

Answer: 18x^3-9x^2+21x

Solution:

3x(6x^2-3x+7)=

Applying the distributive property in the multiplication to eliminate the parentheses:

(3x)(6x^2)+(3x)(-3x)+(3x)(7)=

(3*6)x^(1+2)+3*(-3)x^(1+1)+(3*7)x=

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8 0
3 years ago
There is a 25% chance that Dane will make a three-point shot during a basketball game. A random-number generator generated 10 se
Gelneren [198K]

Answer:

the 25% chance is wrong, it is actually 20%

Step-by-step explanation:

Based on the table of trials shown in the picture, it seems that the 25% chance is wrong. In the table, there are 10 trials and each one has 5 numbers generated, meaning there are a total of 50 numbers generated. Out of these 50 numbers, only 10 are the number 3. Since 3 is the only number that represents a three-point shot, that would make it a 20% (10 / 50) chance that Dane makes a three-point shot in a basketball game.

3 0
3 years ago
A circle has a radius of 4. An arc in this circle has a central angle of 288°.
Vikentia [17]

Answer:

6.4π  units.

Step-by-step explanation:

Length of the arc = radius * the angle in radians

= 4 * 288 * π / 180

= 6.4π.

6 0
3 years ago
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