A toaster has 4 slots for bread once the toaster is warmed up, it takes 35 seconds to make 4 slices of toast, 70 seconds to make 8 slices and 105 seconds to make 12 slices how long do you think it will take to make 20 slices

It will take 175 seconds

Step-by-step explanation:

Let us try to take out the important information in the question:-

*** The toaster takes 35 seconds to make 4 slices of toast.

*** It takes 70 seconds to make 8 slices of toast

*** It also takes 105 seconds to make 12 slices.

*** We are required to calculate how long it may probably take the toaster to make 20 slices.

Since it takes the toaster 35 seconds to make 4 slices of toast and 70 seconds to make 8 slices, we can compare and predict the amount of time a certain number of slices can possibly be made:-

4 slices were made in 35 seconds, 8 slices were made in 70 seconds and 12 slices were made in 105 seconds.

A critical examination reveals that an average of 4 slices was processed or made in about 35 seconds. For every 35 more seconds, the toaster was able to make 4 more slices. We'll then calculate the time it takes the toaster to make 1 slice:

4 slices 35 seconds

1 slice ? seconds

1/4 × 35

= 35/4 seconds

Now, if 1 slice will be made in 35/4 seconds,

20 slices will be made in:

1 slice 35/4 seconds

20 slices ? seconds

(20/1) × 35/4

= 175 seconds

It will take the toaster about 175 seconds to make 20 slices.

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

step-by-step explanation: