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ser-zykov [4K]
3 years ago
7

The three sides of a triangle are 4cm, 6cm and 8cm.

Mathematics
1 answer:
yarga [219]3 years ago
6 0

Answer:

In bold below.

Step-by-step explanation:

(a) The largest angle is opposite the largest side.

So by the Cosine Rule:

8^2 = 4^2 + 6^2 - 2*4*6 cos x

cos x =  (8^2 - 4^2 - 6^2) / (-2*4* 6)

= -0.25.

x = 104.48 degrees.

(b) Area of the triangle = 1/2 * 4 * 6 sin 104.48

= 11.62

= 3 √15.

(c)  The shortest altitude will have the longest sides as the base.

Area = 1/2 * altitude * base

3√15 = 1/2 * 8 * a

a = 3√15 / 4 cm

= 0.75√15 cm.

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An organic farmer buys a piece of land seed plants tomatoes on 5/9 of the land and green beans on 1/12 of the of the land she pl
tino4ka555 [31]
Find how much is reamaining
remaining=1-used
used=tomatoes+beens
used=5/9+1/12

5/9 times 12/12=60/108
1/12 times 9/9=9/108
used=60/108+9/108
used=69/108
used=23/36

1-23/36=
36/36-23/36=
13/36

answer is 13/36
5 0
2 years ago
Read 2 more answers
SOLVE USING ELIMINATION *20 POINTS*
V125BC [204]

1. No answer ( may be due to incorrect question)

2. x = -3

y = 4

3. x= 4

y = 2

4.x = -63/40

y= -19/20

Step 1

Multiply equation 1 by the coefficient of x in equation 2

Multiply equation 2 by the coefficient of x I'm equation 1

(after completing this step you will derive equation 3 and 4 )

Step 2

Subtract equation 4 from equation 3

Step 3

Divide both sides of the equation by the coefficient of y

Step 4

substitute your value for y in equation 1 or 2

(after this you will derive the values of x)

Note : This method is for the Elimination of x

I hope it helps

5 0
3 years ago
40,000 is 10 times as much as
Dimas [21]
40,000 is 10 times as much as 4,000
3 0
3 years ago
Carolyn sells homemade candles. Write an expression for her total revenue if she sells x candles for $5 each
jok3333 [9.3K]

Answer:

I think it would be X x 5 = Y

Step-by-step explanation:

5 0
3 years ago
<img src="https://tex.z-dn.net/?f=4x%5E%7B2%7D%20%2B28x%2B49%3D0" id="TexFormula1" title="4x^{2} +28x+49=0" alt="4x^{2} +28x+49=
Harman [31]

Answer:

x = -7/2 multiplicity 2.

Step-by-step explanation:

 4x^2 + 28x + 49 = 0

(2x + 7)(2x + 7) = 0

This is a perfect square.

2x + 7 = 0, so:

x = -7/2 multiplicity 2.

6 0
3 years ago
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