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blsea [12.9K]
3 years ago
6

15. Evaluate h? - hk + 2k3 – 2 for h = 4 and k=-1.

Mathematics
1 answer:
Pavlova-9 [17]3 years ago
6 0
"The bread-enclosed convenience food known as the "sandwich" is attributed to John Montagu, fourth Earl of Sandwich (1718-1792), a British statesman and notorious profligate and gambler, who is said to be the inventor of this type of food so that he would not have to leave his gaming table to take supper.
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How would you write 10 DIVIDED BY A NUMBER as an algebraic expression?
Alexxx [7]

Answer: C

Step-by-step explanation: 10/b

5 0
3 years ago
Read 2 more answers
I need help with part a and b. sorry its kind of hard to read
Anastasy [175]

Answer:

A) 4900

B) How far above she is before she starts hiking/the distance she is from the canyon floor.

Step-by-step explanation:

Since it's linear, it will follow the formula y=mx+c.

We can sub in the values to get:

3500=m(1)+c → 3500-m=c

2100=m(2)+c → 2100 = 2m+c

Sub '3500-m' in for c:

2100=2m+3500-m

m= -1400

c=3500-m=3500-(-1400)=3500+1400=4900

∴equation is: y= -1400x+4900

To find the initial value, ie when the number of hours = 0, we sub in zero for x:

y = -1400(0) + 4900

PART A ANS: 4900

PART B ANS: Since the number of hours passed is zero, the value represents how far above she is before she starts hiking/the distance she is from the canyon floor.

5 0
3 years ago
Oliver hits a baseball at 3 feet above the ground with an initial speed of 135ft/sec at an angle of 20 degrees with the horizont
Serhud [2]

Answer:

  • <u>Option B) the ball lands in front of the wall</u>

Explanation:

<u>1. Find the vertical and horizontal components of the initial velocity</u>

a) Horizontal component:

      v_{0,x}=v_0\times cos(20\º)=135ft/s\times cos(20\º)=126.86ft/s

b) Vertical component:

      v_{0,y}=v_0\times sin(20\º)=135ft/s\times sin(20\º)=46.17ft/s

<u>2. Find the time when the ball runs 380 feet horizontally:</u>

          x=v_{0,x}\times t\\\\380ft=126.86ft/s\times t

          t= (380ft)/(126.86ft/s)=2.995s\approx 3.0s

<u>3. Find the height of the ball when the time is 3.0s</u>

       y=y_0+v_{0,y}\times t-gt^2/2

  • y₀ = 3 ft
  • g ≈ 32.174 ft/s²

     y=3ft+46.17ft/s\times 3.0s-32.174ft/s^2\times (3.0s)^2/2

     y=-3.3ft

This result means that the ball does not reach the wall because it has fallen to the ground (when y = 0) before 3.0s.

5 0
3 years ago
What is NE? Enter your answer in the box
AnnyKZ [126]
Do you mean north east? If it is something else comment below..
7 0
2 years ago
Three times a number is 4 more than twice the number
Gelneren [198K]

Answer:

3n = 2n + 4

Step-by-step explanation:

That is that as an equation.

5 0
3 years ago
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