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4 years ago

Must the difference between two rational numbers be a rational number? Explain.

1 answer:

Montano1993 [528]4 years ago

3 0

It has to be. if you multiply or divide rational numbers it would be irrational. if you add or subtract two rational numbers it will stay rational.

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The discount on a toy is 40% the toy robot is on sale for $54 find the original price

maria [59]

Answer:

The original price is $90.

Step-by-step explanation:

100% - 40% = 60%

$\frac{54}{y} :\frac{60}{100}$

y × 60 = 54 × 100

60y = 5400

60y ÷ 60 = 5400 ÷ 60

y = 90

5 0

3 years ago

Read 2 more answers

Describe an example of a situation when the graph would be represented with a constant interval.

timofeeve [1]

Answer:

during intesrt amrkets

Step-by-step explanation:

4 0

3 years ago

A triangle has an area of 38.4 cm2. The

lisov135 [29]

Answer:

6cm

Step-by-step explanation:

$A = \frac{h_b b}{2}$

$38.4 = \frac{12.8_b b}{2}$

$b = 2\frac{A}{h_b}$

$b = 2\frac{38.4}{12.8}$ = 6

8 0

3 years ago

Jack's last six scores are 75,78,83,80,79,84. If he scores a 90 on the next test, by how much will his mean test score increase?

kondaur [170]

Answer:

1.46

Step-by-step explanation:

First find the the mean score before he made a 90.

$\frac{75+78+83+80+79+84}{6} = 79.83$

Now add the score of 90 and calculate.

$\frac{75+78+83+80+79+84+ 90}{7} = 81.29$

Subtract the two scores.

$81.29-79.83 = 1.46$

His mean test score increased by 1.46.

8 0

4 years ago

FIND THE AREA OF THE FIGURE BELOW

Romashka [77]

Answer:

220 squared units

Step-by-step explanation:

first, find the area of the rectangle by multiplying 8 by 20. Then, fin the area of the triangle by multiplying 6 by 20 and then dividing the result by 2.

8*20=160

6*20=120

120/2=60

Finally, add them together and you get 220 units squared.

7 0

2 years ago