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2 years ago

Evaluate 4.7 j−6.8k when j=5 and k=3

Mathematics

2 answers:

oksano4ka [1.4K]2 years ago

8 0

Answer:

3.1

Step-by-step explanation:

ok so

4.7j-6.8k J=5 k=3 plug in the values

4.7(5)-6.8(3)

23.5-20.4

3.1

ale4655 [162]2 years ago

4 0

Answer:

3.1

Step-by-step explanation:

replace the variables (4.7)5-(6.8)3

then solve using pemdas

4.7 times 5 =23.5

6.8 times 3= 20.4

23.5 - 20.4= 3.1

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A mirror is 24 inches high and 28 inches wide. The center of the mirror will hang 514 feet from the floor on a wall that is 8 fe

Vanyuwa [196]

The distance from the top of the mirror to the ceiling once the mirror is hung on the wall is 21 inches

The dimension of the mirror is given as:

$Height = 24\ in$

$Width = 28\ in$

From the center of the mirror to the floor of the wall, the distance is:

$Distance =5\frac14\ ft$

So, the distance to the top of the mirror will be:

$Top = 5\frac 14\ ft + \frac 12 \times Height$

Substitute 24 for height

$Top = 5\frac 14\ ft+ \frac 12 \times 24\ in$

$Top = 5\frac 14\ ft+ 12 \ in$

Convert feet to inches

$Top = 5\frac 14\times 12\ in+ 12 \ in$

$Top = 63\ in+ 12 \ in$

$Top = 75 \ in$

The distance from the top of the mirror to the ceiling is the difference between the height of the wall and 75 inches.

So, we have:

$Distance = 8\ ft - 75\ in$

Convert feet to inches

$Distance = 8\times 12\ in - 75\ in$

$Distance = 96\ in - 75\ in$

$Distance = 21\ in$

Hence, the distance is 21 inches