All categories

3 years ago

HELP MEEEEEEE PLEASE

Mathematics

2 answers:

saw5 [17]3 years ago

6 0

Answer:

3 option

Step-by-step explanation:

Readme [11.4K]3 years ago

5 0

Answer:

Step-by-step explanation:

Twice means multiplicaiton of 2

So the answer is 2s

You might be interested in

Evaluate the given expression when x = -4 and y = -1<br> 3x^2 - xy + 2y ^2

Inessa [10]

Answer:

Step-by-step explanation:

7 0

3 years ago

The diameter of a circle measures 32 yd. What is the circumference of the circle?

Alexxandr [17]

Answer:

100.48yds

Step-by-step explanation:

C= Circumference

π=3.14

R=radius

C=2πr

C=2(3.14)*16

C=6.28*16

C=100.48yds

4 0

3 years ago

A recipe calls for 1/2 cup of milk for every 3/4 cup of flour. How much milk is required for every cup of flour?

ryzh [129]

Answer:

3/4

Step-by-step explanation:

7 0

3 years ago

In the month of June, the temperature in Johannesburg, South Africa, varies over the day in a periodic way that can be modeled a

UNO [17]

Answer:

T = - 7.5 Cos π/12( t - 4 ) + 10.5

Step-by-step explanation:

Given that the

Maximum temp. = 18 degree Celsius

Minimum temp. = 3 degree Celsius

The half way between 10 am and 10 pm is 4 am

The sine and cosine functions can be used to model fluctuations in temperature data through out the year. An equation that can be used to model these data is of the form:

T = A cos B(t - C) + D, where A,B,C,D, are constants, T is the temperature in °C and t is the hour (1–24)

A = amplitude = (Tmax - Tmin)/2

A = (3 - 18)/2 = - 15/2 = -7.5 ( note : after midnight)

B = 2π/24 = π/12

C = units translated to the right

C = 4

D = ymin + amplitude = units translated up

D = 7.5 + 3 = 10.5

The formula of the trigonometric function that models the temperature T in Johannesburg t hours after midnight we be

T = - 7.5 Cos π/12( t - 4 ) + 10.5

3 0

4 years ago

Solve the simultaneous equations 3x- 4y =20 and 4x-2y = 25

True [87]

Answer:

(6, - $\frac{1}{2}$ )

Step-by-step explanation:

Given the 2 equations

3x - 4y = 20 → (1)

4x - 2y = 25 → (2)

Multiplying (2) by - 2 and adding to (1) eliminates the y- term

- 8x + 4y = - 50 → (3)

Add (1) and (3) term by term to eliminate y

- 5x = - 30 ( divide both sides by - 5 )

x = 6

Substitute x = 6 into either of the 2 equations and evaluate for y

Substituting into (1)

3(6) - 4y = 20

18 - 4y = 20 ( subtract 18 from both sides )

- 4y = 2 ( divide both sides by - 4 )

y = $\frac{2}{-4}$ = - $\frac{1}{2}$

Solution is (6, - $\frac{1}{2}$ )

3 0

3 years ago

Read 2 more answers