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dimaraw [331]
2 years ago
10

Paul is adding mulch along the edge of his driveway. He orders 7 bags of mulch for $392. How much would it cost if Paul orders 9

bags instead?
A. $392
B.$448
C.$504
Mathematics
2 answers:
Ksivusya [100]2 years ago
8 0

Answer:

$504

Step-by-step explanation:

392 ÷ 7= 56

9 x 56 = $504

:]

Lubov Fominskaja [6]2 years ago
8 0
The answer is C.
you would take the $392 and divide it by 7 which equals 56. That means 1 bag of mulch equals $56. So if Paul wants 9 bags, you would add the cost of 2 more bags of mulch to the $392.
56x2=112
392+112=504
it would cost $504 for 9 bags of mulch.
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Find, correct to the nearest degree, the three angles of the triangle with the given vertices. A(1, 0, −1), B(4, −3, 0), C(1
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Answer:

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Step-by-step explanation:

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AC = C-A = (1-1, 4-0, 3-1) = (0, 4, 2)

BC = C-B = (1-4, 4-3, 3-0) = (-3, 1, 3)

2. Find magnitude of the vectors

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AB, BC : θ =arc cos (AB.BC)/(|AB||BC|) = arc cos( (3.-3+3.1+ -1.3)/(√19  x √19)=  (-9)/19 ) = 118.27°

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180-118.27 = 61.73°

If we used –(BC) = CB in the formula (just negate the numerator) we would have gotten the correct angle on first try.

The 3rd angle should be what’s left after subtracting from 180°;

180-61.73-59.14 = 59.13 °

You can confirm using the formula again :

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Rounding everything up so they add up to 180 degrees we have Angle at vertex  A : 59.2° B: 61.7° C : 59.1°

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