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4 years ago

EASY NEED HELP MATH QS

Mathematics

2 answers:

ddd [48]4 years ago

6 0

Answer:

C) 29.4

Step-by-step explanation:

Plug in 42 for t in the equation:

f(t) = 0.7t

t = 42

f(42) = 0.7 * (42)

Multiply:

f(42) = 0.7 * 42

f(42) = 29.4

C) 29.4 is your answer.

weqwewe [10]4 years ago

3 0

Answer:

29.4

Step-by-step explanation:

42*0.7

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Artyom0805 [142]

Answer:

The total cost of producing 6 widgets is $231.

Step-by-step explanation:

5 0

3 years ago

Michael can buy 4 sandwiches and 3 cups of coffee for $23.75. Amy can buy 2 sandwhiches and 5 cups of coffee for $19.75 how much

Kobotan [32]

Answer: The cost of one sandwich is $4.25 and the cost of one cup of coffee is $2.25.

Step-by-step explanation:

Let x be the cost of one sandwich and y be the cost of one cup of coffee.

By considering the given situation, we have the following equations :-

$4x+3y=23.75.................(1)\\\\2x+5y=19.75................(2)$

Multiply 2 on both sides of equation (2) , we get

$4x+10y=39.5................(3)$

Subtract equation (1) from equation (3), we get

$7y=15.75\\\\\Rightarrow\ y=\dfrac{15.75}{7}=2.25$

Put value of y in (1), we get

$4x+3(2.25)=23.75\\\\\Rightarrow\ 4x+6.75=23.75\\\\\Rightarrow\ 4x =17\\\\\Rightarrow\ x=4.25$

Hence, the cost of one sandwich is $4.25 and the cost of one cup of coffee is $2.25.

8 0

3 years ago

A jog runs at a speed of 4m/s for 10 minutes. Work out the distance travelled.

krok68 [10]

Answer:

2,400 meters

Step-by-step explanation:

4 × 60 sec = 240 meters a minutes

240 meters × 10 minutes = 2,400 meters in 10 minutes

7 0

4 years ago

Solve the equation Axb by using the LU factorization given for A. Also solve Axb by ordinary row reduction. A , b Let Lyb and U

bulgar [2K]

Answer: Hello your question is poorly written attached below is the complete question

answer:

$y = \left[\begin{array}{ccc}-4\\-11\\5\end{array}\right]$

$x = \left[\begin{array}{ccc}16\\12\\-40\end{array}\right]$

Step-by-step explanation:

$y = \left[\begin{array}{ccc}-4\\-11\\5\end{array}\right]$

$x = \left[\begin{array}{ccc}16\\12\\-40\end{array}\right]$

attached below is the detailed solution using LU factorization

6 0

3 years ago

12X12= ___+144-88=___

nalin [4]

12x12=144+144-88=200 good luck!

4 0

3 years ago

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