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3 years ago

Olivia writes an expression that is the sum of three terms.

Mathematics

1 answer:

BabaBlast [244]3 years ago

8 0

Answer:

n= 2

2 x 6= 12

9x2=18

4x0=0

12+18+0=30

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Car A travels 20 mph faster than Car B. In the same time that Car A travels 252 miles, Car B travels 196 miles. Find their speed

RoseWind [281]

Answer:

A = 70

B = 90

Step-by-step explanation:

We know that Car A travels 20 mph faster than Car B.

Assuming the speed of Car B to be x and the speed of Car A to be x+20, we can write:

$\frac{196}{x} =\frac{252}{x+20}$

Taking the reciprocal of both sides to make x the subject:

$196(x+20)=252x$

$196x+3920=252x$

$252x-196x=3920$

$56x=3920$

$x=70$ ---> speed of Car A

Finding the speed of Car B: $x+20 = 70+20=90$

Therefore, the speed of Car A = 70 and the speed of Car B = 90.

8 0

3 years ago

What are the amplitude, period, and phase shift of the given function? f(t)=-1/2sin(3t-2pi)

Romashka [77]

Answer:

The $amplitude=|A|=\frac{1}{2}$ , $period=3$ and $\text{phase shift}=\frac{2\pi}{3}$ .

Step-by-step explanation:

The given function is

$f(t)=-\frac{1}{2}\sin (3t-2\pi)$ .... (1)

The general form of sine function is

$F(t)=A\sin (Bt-C)+D$ ....(2)

where, |A| is the amplitude, B is period, D is the vertical shift (up or down), and C/B is used to find the phase shift.

On comparing (1) and (2), we get

$A=-\frac{1}{2}$

$B=3$

$C=2\pi$

$D=0$

So,

$amplitude=|A|=\frac{1}{2}$

$period=3$

$\text{phase shift}=\frac{2\pi}{3}$

Therefore $amplitude=|A|=\frac{1}{2}$ , $period=3$ and $\text{phase shift}=\frac{2\pi}{3}$ .

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3 years ago

A pound of chocolate costs 8 dollars. Ann buys p pounds. Write an equation to represent the total cost c that Ann pay

aleksandrvk [35]

Answer:

Since it is 6 dollars per pound, his total cost c is 6 times p...thus

c = 6p

Hope this helps and hopefully I can get brainliest.

5 0

3 years ago

What is the slope of the point (1÷4,3÷2)and (-1,-3)

Viefleur [7K]

Step-by-step explanation:The slope calculator helps find the slope of any line through two given ... the slope of the line passing through the points (3,8) and (-2, 10) . ... A 1/20 slope is one that rises by 1 unit for every 20 units traversed horizontally.

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3 years ago

Read 2 more answers

NEED HELP ASAP, QUICK I NEED THE AREA PLZ!!!

pashok25 [27]

Use a= $\pi$ r^2 (r represents your radius of 4 feet)

$\pi$ (4^2)
Answer = 16 $\pi$ ^2

7 0

3 years ago