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qwelly [4]
3 years ago
8

Translate the sentence into an equation. Twice the difference of a number and 2 equals 9 . Use the variable y for the unknown nu

mber.
Mathematics
1 answer:
xxMikexx [17]3 years ago
8 0
Since difference is subtraction, that means that y-2=9 and by adding 2 to both sides we get y=11
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How do you round the area of a circle with 3.14?
kirill115 [55]

Answer:

(This is a example since you don’t have anything to round to)

Example Answer if the radius is 4 - 50.24

Step-by-step explanation:

Example Radius : 4

Area : 3.14

We have the mulitiply 3.14 times The Example Radius 2 times because The diameter of a circle is 2 times its radius.

( 3.14 x 4 x 4) 50.24

If you know the diameter, it’s a half or 1/2 as large.

Therefore, if the radius was 4, it would be 50.24.

Youre welcome :)

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Anon25 [30]

Answer:

Corresponding side of AB is FE

Corresponding side of CB is DE

Corresponding side of AC is FD

k =2

DE = 6

FD=10

Step-by-step explanation:

Given

\triangle ABC and \triangle FED

See attachment for triangles

Solving (a): Corresponding side of AB

Going by the names of the triangle, the corresponding sides are:

AB and FE; CB and DE; AC and FD

Hence, the corresponding side of AB is FE

Solving (b): Corresponding side of CB

This has been solved in (a) above.

The corresponding side of CB is DE

Solving (c): Corresponding side of AC

This has been solved in (a) above.

The corresponding side of AC is FD

Solving (d): Scale factor from ABC to FED

To do this, we simply divide the lengths of corresponding sides.

The scale factor k is:

k = \frac{FE}{AB}

k = \frac{8}{4}

k =2

Solving (e): Length of DE

We make use of the scale factor calculated in (d) above

k = \frac{DE}{CB}

2 = \frac{DE}{3}

DE = 2 * 3\\

DE = 6

Solving (f): Length of FD

Using Pythagoras:

FD^2 = DE^2 + EF^2

FD^2 = 6^2 + 8^2

FD^2 = 100

FD = \sqrt{100

FD=10

7 0
3 years ago
F(x)=8x +5, which function represents f(e-9)
Ronch [10]

Answer:

f(e - 9) = 8e - 67

Step-by-step explanation:

To evaluate f(e - 9) substitute x = e - 9 into f(x)

f(e - 9) = 8(e - 9) + 5 = 8e - 72 + 5 = 8e - 67

7 0
3 years ago
NEvermind ..............
Vadim26 [7]
If you still need an answer but it’s B
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3 years ago
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