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3 years ago

4. Write neatly and legibly.QUESTION 11.1Find the sum:1.1.1 2+6+(-7) + 10 = 11

2 answers:

7 0

Hey
So first you need to remove the brackets

When there is a in front of an expression in brackets, the expression remains the same

2+6-7+10=11

Then combine the numbers and it comes out as 11 so it’s true

Sindrei [870]3 years ago

6 0

Find the sum:

1.1.1 2+6+(-7) + 10 = 11

11=11

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Find the shortest side of a triangle whose perimeter is 64 if the ratio of two of its sides is 4:3 and the third side is 20 less

Sergio039 [100]

Answer:

The shortest side of the triangle is 18

Step-by-step explanation:

Let the sides the triangle be x, y and z.

From the question, the perimeter of the rectangle is 64, that is

x + y + z = 64 ...... (1)

Also, the ratio of two of its sides is 4:3, that is x:y = 4:3, then we can write that x/y = 4/3 ⇒ 3x = 4y ...... (2)

The third side, z, is 20 less than the sum of the other two, that is

z + 20 = x + y ...... (3)

Substitute equation (3) into (1)

Then,

z + 20 + z = 64

2z +20 = 64

2z = 64 - 20

2z = 44

z = 44/2 k

z = 22

From equation (3)

z + 20 = x + y

Then, k

22 + 20 = x +y

42 = x + y

x = 42 - y ...... (4)

Substitute this into equation 2

3x = 4y

3(42-y) = 4y

126 - 3y = 4y

4y + 3y = 126

7y = 126

y = 126/7

y = 18

Substitute this into equation (4)

x = 42 - y

x = 42 - 18

x = 24

∴ x = 24, y = 18 and z = 22

Hence, the shortest side of the triangle is 18.

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3 years ago

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Lisa [10]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Please answer this correctly

wolverine [178]

Answer:

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Step-by-step explanation:

Since the diameter of a circle is twice the radius, the radius of this circle is 36/2=18. Since the area of a circle is $\pi r^2$ , the area of this circle is: