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Murljashka [212]
2 years ago
7

Josephine can correct her students test papers in 5 hours, but if her teacher’s assistant helps, it would take them 3 hours. How

long would it take the assistant to do it alone?
Mathematics
1 answer:
ipn [44]2 years ago
4 0

<u><em>7 hours 30 minutes</em></u>

<u><em></em></u>

Sure hope this helps you :D

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Jobisdone [24]

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1. 7

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5 0
3 years ago
Read 2 more answers
 PLZ HELP EASY PLZ HELP ME Two vertices of a right triangle have the coordinates (−2, 5) and (9, 5) .
Sever21 [200]
I say its 11. Since the distance between the two points is 11. 

6 0
3 years ago
Read 2 more answers
I need help......................
Black_prince [1.1K]

Answer:

a) false

b) true

c) true

d) false

hope dis helps ^-^

8 0
3 years ago
A bank requires a monthly payment of $32.88 on a $2500 loan. At the same rate find the monthly payment on a $50,000 loan
Bingel [31]

$ 657.6

Step-by-step explanation:

Step 1:

Given,

Principal = $2500

Monthly payment  = $32.88

Step 2 :

The amount of monthly payment and the principal amount are in direct proportion , that is when the principal amount increases the monthly payment increases and when the principal decreases the monthly payment decreases.

Step 3 :

The monthly payment for $2500 is $32.88

Therefore for a principal of $50000, the amount of  monthly payment is

32.88 *50000/2500 = $657.6

6 0
3 years ago
A boat’s velocity, measured in meters per second, is described by vector b⇀=⟨3,4⟩. In two or more complete sentences explain how
Sedbober [7]

Answer: Velocity is a vector, so it has a magnitude and direction.

Speed is its magnitude, which is obtained from

|〈-3, 4〉 m/s| = √((-3 m/s)² + (4 m/s)²) = √(25 m²/s²) = 5 m/s

Its direction is an angle θ made with the positive horizontal axis, satisfying

tan(θ) = (4 m/s) / (-3 m/s) = -4/3   →   θ = arctan(-4/3) + 180°n

where n is any integer. Now you have to consider that the x coordinate is negative and the y coordinate is positive, so 〈-3, 4〉 points into the second quadrant, and we get an angle there for n = 1 of about

θ ≈ 126.87°

Alternatively, you can use the vector 〈1, 0〉 in place of the axis, then compute the angle by relating it to the dot product, so θ is such that

〈-3, 4〉 • 〈1, 0〉 = |〈-3, 4〉| |〈1, 0〉| cos(θ)

(-3)•1 + 4•0 = √((-3)² + 4²) • √(1² + 0²) cos(θ)

-3/5 = cos(θ)   →   θ = arccos(-3/5) + 360°n

where again, n is any integer, and we get the same solution θ ≈ 126.87° in the second quadrant when n = 0.

Step-by-step explanation:

5 0
2 years ago
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