MATHEMATICS MIDDLE SCHOOL

a machine takes 4.2 hours to make 7 parts. at that rate how many parts can the machine make in 28.8 hours

Answers

Answer 1

Answer:

Answer:

48 Parts

Step-by-step explanation:

Answer 2

Answer: In 1 hour, a machine could make:
$7 / 4.2$
parts
In 28.8 hours, that machine make
$7 / 4.2 * 28.8 = 4.8$
parts

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How many solutions are there to the following system of equations?4x – 8y = 0
–3x + 8y = –7

A. 2
B. 1
C. 0
D. infinitely many

Answers

$4x-8y=0 \n\underline{-3x+8y=-7} \n4x-3x=0-7 \nx=-7 \n \n4x-8y=0 \n4 * (-7)-8y=0 \n-28-8y=0 \n-8y=28 \ny=(28)/(-8) \ny=-(7)/(2) \n \n \left \{ {{x=-7} \atop {y=-(7)/(2)}} \right.$

There is one solution to this system of equations. The answer is B.

$-4x-8y=0\n\underline{-3x+8y=-7}\n-7x=-7\nx=1 \Rightarrow B$

Other ways to express 10^4

Answers

Answer:

one way is 10000

Step-by-step explanation:

In the data set below, what is the lower quartile?89 99 95 87 78.4 96

Answers

put the numbers in order...
78.4 , 87, 89, 95, 96, 99

Q1 (lower quartile) = 87
Q2 (median) = (89 + 95) / 2 = 184/2 = 92
Q3 (upper quartile) = 96

The lower quartile is 87.

Hope This Helps You!
Good Luck Studying :)

How do I solve this?
$(3x)/(8) - 1 = (5)/(8)$

Answers

To solve this problem, we first have to combine the two fractions on the left side of the equation. To do this, we must make a common denominator of 8. Because 8/8 is equal to 1, we can substitute this value into the equation:

3x/8 - 8/8 = 5/8

Next, we can subtract the fractions on the left side of the equation to simplify. Remember that if fractions have the same denominator, we simply subtract their numerators and keep the difference over the common denominator.

3x - 8/8 = 5/8

Since both sides of the equation have a denominator of 8, we can cancel out this denominator on both sides by multiplying both sides by 8. This gives us:

3x - 8 = 5

Next, we should add 8 to both sides of the equation so that we can get all of the constants to the right side of the equation.

3x = 13

Finally, we should divide both sides by 3 to get the variable alone on the left side of the equation.

x = 13/3

Therefore, your answer is x = 13/3.

Hope this helps!

If 80% is 72 marks what is full marks

can someone tell me the answer please

Answers

80% = 0.8

100% = 1

0.8 = 72

1 = x

0.8* x = 72 * 1

x = 72 / 0.8 = 90

0.8 * 90 = 72

80% * 90 = 72

to make a fruit salad Marvin mixes 1 3/4 cups of diced peaches with 2 1/4 cups of diced pears how many cups of peaches and pears are in a fruit salad

Answers

4 cups....

First, change the proper fractions to improper fractions.

2 1/4 = 9/4

1 3/4 = 7/4

Then, add the improper fractions.

9 7 16
--- + ---- = --------- = 4
4 4 4

4 cups of peaches and pears

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