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Mandarinka [93]
3 years ago
12

Use rounding to estimate the product. 8x 9.8.

Mathematics
1 answer:
solmaris [256]3 years ago
3 0

Answer:

78

Step-by-step explanation:

8 x 9.8 = 78.4, rounds to 78

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If P is the orthocenter of △ABC, AB = 13, BF = 9,and FC = 5.6, find each measure & the perimeter of triangle ABC.
harina [27]

Answer:

Perimeter = 38.6

Step-by-step explanation:

Given

A\ B = 13

B\ F = 9

F\ C = 5.6

Required

Calculate the perimeter of A B C

To calculate the perimeter of A B C, we sum up the sides of the triangle

i.e.

Perimeter = A B + B\ C + A\ C

AB is given in the question already.

So, we need to calculate B F and F C

To solve for BF, we consider triangle B F C

Using Pythagoras Theorem, we have:

B\ C^2 = B\ F^2 + F\ C^2

Substitute values for BF and FC;

B\ C^2 = 9^2 + 5.6^2

B\ C^2 = 81 + 31.36

B\ C^2 = 112.36

B\ C^2= \sqrt{112.36

B\ C = 10.6

Next, we calculate A C.

To calculate A C, we need to calculate A F, considering triangle B F A

Using Pythagoras Theorem, we have:

A\ B^2 = B\ F^2 + A\ F^2

Substitute values for B F and A B;

13^2 = 9^2 + A\ F^2

169= 81 + A\ F^2

A\ F^2 = 169 - 81

A\ F^2 = 88

A\ F = \sqrt{88

A\ F = 9.4

Since F lies on line A C:

A\ C = A\ F + F\ C

A\ C = 9.4 + 5.6

A\ C = 15.0

Recall that:

Perimeter = A\ B + B\ C + A\ C

Perimeter = 13 + 10.6 + 15.0

Perimeter = 38.6

<em>Hence, the perimeter is 38.6</em>

3 0
3 years ago
Can someone please help me
iren2701 [21]
It would be 30 degrees since a line is 180. You subtract 150 from 180 and get 30.
4 0
3 years ago
Read 2 more answers
If k=100 - 4n what’s the value when n=60
dexar [7]
To solve this problem, start by plugging in your given n value.
This results in:
k = 100 - 4(60)

Next, simplify the parentheses by multiplying the -4 and the 60 together.
This leaves you with:
k = 100 - 240

To simplify for k, subtract 240 from 100 to get:
k = -140

So your final answer is k = -140 when n = 60
4 0
3 years ago
Enter the value of n so the expression (-y + 5.3) + (7.2y - 9) is equivalent to 6.2y + n.
forsale [732]
The answer is that n=-3.7
5 0
4 years ago
99 POINTS
Allisa [31]
1. slope is -6/2 which simplifies to -3
4. it will travel 275 miles
3. the slope of the line is .15, each pencil costs 15 cents
thats all ik
7 0
3 years ago
Read 2 more answers
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