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torisob [31]
3 years ago
9

ABCD is a quadrilateral Work out the length of BC Give your answer to 1 decimal place

Mathematics
1 answer:
Likurg_2 [28]3 years ago
5 0

Answer:

8.1

Step-by-step explanation:

Use Pythagoras to find the length of BD- 7.5^2 +5^2=81.25

The square root of 81.25 is 9.01

BD-9.01 cm

Then use the cos rule to find BC.

c=a2+b2﹣2abcosγ=9.012+132﹣2·9.01·13·cos(38°)≈8.09819(square root)

round to 8.1

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Use the graph that shows the solution to f(x)=g(x) .
n200080 [17]

Answer:

1.  x=3   x=1

2.  x=0

Step-by-step explanation:

We want f(x) to equal g(x)

f(x)=g(x)

1/(x-2) = (x-2)

Using cross products

1 = (x-2) * (x-2)

1 = x^2 -2x-2x+4

Subtract 1 from each side

1-1 = ^2 -2x-2x+4-1

0 = x^2 -4x+3

Factoring

What number multiplies to 3 and adds to -4

-3*-1 = 3

-3+-1 = -4

0= (x-3) (x-1)

Using the zero product property

x-3 =0     x-1=0

x=3   x=1



2.  f(x)=x^2+4x+2

g(x)=(1/2)^ x+1


From the graph,we can see they intersect at x=0

5 0
3 years ago
-2x – 4 &lt; 3x + 21<br> Solve the inequality
I am Lyosha [343]

Isolate the x. Subtract 3x from both sides, and add 4 to both sides

-2x (-3x) - 4 (+4) < 3x (-3x) + 21 (+4)

-2x - 3x < 21 + 4

Simplify. Combine like terms

-5x < 25

Isolate the x. Divide -5 from both sides (remember to flip the sign).

-5x/-5 < 25/-5

x > 25/-5

x > -5

x > -5 is your answer

hope this helps

7 0
3 years ago
What's the answer and show your work by using the funnel method
Paraphin [41]
Answer: i got 44 for the answer
5 0
2 years ago
Can someone help me please i need to get this right
mixer [17]

Answer:

If there are 2 quarters for every 3 nickels,

then there are 45*\frac{2}{3} =30 quarters.

If there are 2 dimes for every quarter,

then there are 30*2=60 dimes.

If the number of pennies and nickels together are equal to the number of dimes, then there are 60-45=15 pennies.

6 0
2 years ago
Please help me asap​
puteri [66]

1. 3.875

2. .35

3. 9 3/4

3 0
3 years ago
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