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iren2701 [21]
3 years ago
13

This question is confusing. Please help me!

Mathematics
2 answers:
velikii [3]3 years ago
7 0

Answer:

x = 18

Step-by-step explanation:

Given:

  • a = 2x +3
  • b = 4x - 7

Finding x for which 3b = 5a:

  • 3b = 5a
  • 3(4x - 7) = 5(2x + 3)
  • 12x - 21 = 10x + 15
  • 12x - 10x = 15 + 21
  • 2x = 36
  • x = 36/2
  • x = 18
bogdanovich [222]3 years ago
6 0

Answer:

x = 18

Step-by-step explanation:

Plug in 4x-7 for b and 2x+3 for a in 3b = 5a

3(4x-7) = 5(2x +3)

Solve for x:

12x-21 = 10x+15

2x = 36

x=18

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The coach took a digital photo of the new cycling team bike. She sent a 4 cm-by-6 cm photo to each team
erastova [34]

Answer:

1. 9 cm

2. 50%

3. Assuming the photo is a rectangle, the answer would be 90 degrees on every angle (in a dilation, angle measurements are congruent).

Step-by-step explanation:

1. The long side is clearly the 6 cm side. multiply it by 1.5x (150%) and you get 9.

2. 2 is 50% of 4 and 3 is 50% of 6.

3. Assuming the photo is a rectangle, the answer would be 90 degrees on every angle (in a dilation, angle measurements are congruent).

6 0
3 years ago
Can Somebody Please Explain How To Do It? THANKS
sergejj [24]

Hello from MrBillDoesMath!

Answer:

9


Discussion:

Solution 1:

Distance between two points (x1, y1), (x2,y2) is given by the formula

sqrt(  (x1-x2)^2 + (y1-y2)^2).  In our case this becomes

sqrt( (0-0)^2 +  (12 -3)^2 ) =

sqrt( 9^2) =

9.


Solution 2:

Note points D and E both have x = 0 so segment DE is a vertical segment. The length is simply the difference of the y coordinates: 12- 3 = 9 as before.


Thank you,

MrB

6 0
3 years ago
Kyle started biking at a constant rate of 15 mph. Half an hour later, Kim followed on the same path at a constant rate of 18 mph
lidiya [134]
The answer is...

It would take kim approximately* dont know if I spelled it correctly* 2 hours 30 minutes to catch up with kyle.
4 0
4 years ago
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Please explain how and give the answer!
nadezda [96]
The mass of b equals the mass of d so
24(10-x)=6(x+15)
240-24x=6x+90
30x=150
x=5
mass of d is 6(5+15)=6*20=120
mass of c=180-mas of d=180-120=60°
7 0
3 years ago
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Solve the inequality.<br> 1<br> x+5 &lt; 6<br> 2<br><br> Help me please
Nina [5.8K]

Answer:

If we are solving x + 5< 6 the inequality is x< 1

Step-by-step explanation:

If helps mark as brainllest please!!!

8 0
3 years ago
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