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Eva8 [605]
3 years ago
8

In this question , all lengths are in centimetres. AB= 3x-4,AC=2x+12,BC=7x-2.given AB:AC=1:2 show that AC:BC=2:3

Mathematics
2 answers:
Archy [21]3 years ago
8 0

Answer:

c on edg...

Step-by-step explanation:

Lelu [443]3 years ago
4 0

Answer:

AX : XB as AB : AC

AX = 5

XB = 4

AC = 6

AB = x

Step-by-step explanation:

5 : 4 as to x : 6

ratios can also be written as fractions...

5/4 = x/6 ..now we have a proportion...so we cross multiply

(4)(x) = (5)(6)

4x = 30

x = 30/4

x = 15/2 <==== AB = 15/2

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Can someone please help me with this
omeli [17]

Answers:

  • x = 3
  • CD = 21
  • DE = 16
  • CE = 21

=============================================================

Explanation:

The congruent base angles are D and E. Opposite those angles are the sides CE and CD. These opposite sides are the same length.

CE = CD

16x-27 = 4x+9

16x-4x = 9+27

12x = 36

x = 36/12

x = 3

This x value then leads to the following:

  • CD = 4x+9 = 4*3+9 = 12+9 = 21
  • DE = 7x-5 = 7*3-5 = 21-5 = 16
  • CE = 16x-27 = 16*3-27 = 48-27 = 21

We see that CD and CE are both 21 units long, which helps confirm we have the correct x value.

5 0
2 years ago
Read 2 more answers
Solve for x- <br> 6x^2 + 36x + 54 = 0
lions [1.4K]

Answer:

-3

Step-by-step explanation:

6x^2+36x+54=0

First, you can factor out a 6:

6(x^2+6x+9)=0

Next, you can factor the quadratic:

6(x+3)^2=0

Since the only value of x that could set this equation equal to 0 is -3, that is the answer. Hope this helps!

5 0
3 years ago
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8 0
3 years ago
The Red Rox have won 3 World Series titles in the last 11 years. At this rate, how long will it take them to win 20 World Series
Alex787 [66]

Answer:

73 1/3 years

Step-by-step explanation:

3 WST = 11 years              FInd the unit rate

1 WST = 11/3

20 WST =  220/3 or 73 1/3 years

<h3><u><em>Hope this helps!!! </em></u></h3><h3><u><em>Please mark this as brainliest!!! </em></u></h3><h3><u><em>Thank You!!! </em></u></h3><h3><u><em>:)</em></u></h3>
8 0
3 years ago
What is the value of x in the equation 5x+3=4x?
Volgvan

Answer:

x = -3

Step-by-step explanation:

5x + 3 = 4x,

x + 3 = 0,

x = -3

3 0
3 years ago
Read 2 more answers
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