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Ludmilka [50]
3 years ago
7

Can someone please answer this question please answer it quickly I need it please answer it correctly and please please show wor

k

Mathematics
2 answers:
Zielflug [23.3K]3 years ago
5 0

Answer:

B

Step-by-step explanation:

2.5×2 + 2.5×4 + 2.5×3

Take 2.5 common

2.5(2 + 4 + 3)

motikmotik3 years ago
3 0

Answer:

The answer is B

Step-by-step explanation:

1. 2.50 x 2 is $5

2. 2.50 x 4 is $10

3. 2.50 x 3 is $7.50

4. 5 + 10 + 7.50 is 22.50 so you know the total should be 22.50.

5. It cant be A because 2.50 x 2 is 5 then timesing that by four would make 20 and then by 3 that would make $60 not $22.50

6. It is B because 2 + 4 + 3 is 9, 9x2.50 is 22.50

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Karabo is training by running for the Comrades Marathon ; he starts his training by running 40km per week . Each week he increas
sweet-ann [11.9K]

Answer:

hi

Step-by-step explanation:

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3 0
2 years ago
How do you solve this?
Karolina [17]
I don’t know sorry! I might learn that soon so… I’ll see if u can help lately
3 0
3 years ago
CALCULUS EXPERT WANTED
Vlad [161]

a. Use the mean value theorem. 16 falls between 12 and 20, so

v'(16)\approx\dfrac{v(20)-v(12)}{20-12}=\dfrac{240-200}8=5

(Don't forget your units - 5 m/min^2)

b. v(t) gives the Johanna's velocity at time t. The magnitude of her velocity, or speed, is |v(t)|. Integrating this would tell us the total distance she has traveled whilst jogging.

The Riemann sum approximates the integral as

\displaystyle\int_0^{40}|v(t)|\,\mathrm dt=12\cdot200+8\cdot240+4\cdot220+16\cdot150=7600

If you're not sure how this is derived: we're given 5 sample points, so we can cut the interval [0, 40] into 4 subintervals. The lengths of each subinterval are 12, 8, 4, and 16 (the distances between each sample point), and the height of the rectangle approximating the area under the plot of |v(t)| is determined by the value of v(t) at each sample point, 200, 240, |-220| = 220, and 150.

c. Bob's velocity is given by B(t), so his acceleration is given by B'(t). We have

B'(t)=3t^2-12t

and at t=5 his acceleration is B'(5)=15 m/min^2.

d. Bob's average velocity over [0, 10] is given by the difference quotient,

\dfrac{B(10)-B(0)}{10-0}=\dfrac{700-300}{10}=40 m/min

6 0
3 years ago
Idk what the properties are I need help
slega [8]
Associative,commutative and distributive
3 0
3 years ago
If 0°<0<90° and sin0=12/13, find cos0 using trigonometric identities.
Aleks04 [339]

here's the solution,

we know :

\sin( \theta)  =  \dfrac{perpendicular}{hypotenuse}

So,

\dfrac{p}{h}  =  \dfrac{12}{13}

so.. let the perpendicular be 12x and hypotenuse be 13x

now,

by applying pythagoras theorem,

  • b {}^{2}  = h {}^{2}  - p {}^{2}

where,

  • b = base
  • h = hypotenuse
  • p = perpendicular

So,

  • b {}^{2}  =  ({13x})^{2}  -  ({12x})^{2}
  • b  {}^{2} = 169x {}^{2}  - 144x {}^{2}
  • {b}^{2}  = 25x {}^{2}
  • b  = 5x

so,

  • \cos( \theta)  =  \dfrac{b}{h}

  • \cos( \theta)  =   \dfrac{5x}{13x}

  • \cos( \theta)  =  \dfrac{5}{13}

hope it helps !!

3 0
3 years ago
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