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2 years ago

10

What is the difference, in hours and minutes, between these times?

1 answer:

solmaris [256]2 years ago

3 0

Answer:

a)3hours and 15mins

b)3hours and 10mins

c)2hours and 20mins

d)8hours and 40mins

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Please I'm in urgent need of help. what must be added to make (1/4)x^2-(2/3)xy a perfect square?.

Ipatiy [6.2K]

Answer:

$\bigg(\frac{2}{3} {y} \bigg)^{2}$

STEP BY STEP EXPLANATION

$\frac{1}{4} {x}^{2} - \bigg( \frac{2}{3} \bigg)xy \\ \\ = \bigg(\frac{1}{2} {x} \bigg)^{2} - 2. \bigg(\frac{1}{2} {x} \bigg)\bigg( \frac{2}{3} y \bigg ) + \bigg(\frac{2}{3} {y} \bigg)^{2} \\ \\ = \bigg(\frac{1}{2} {x} - \frac{2}{3} y\bigg)^{2} \\$

To make $\red{\bold{\frac{1}{4} {x}^{2} - \bigg( \frac{2}{3} \bigg)xy}}$ a perfect square we should add $\purple{\bold{\bigg(\frac{2}{3} {y} \bigg)^{2}}}$

8 0

2 years ago

Read 2 more answers

A farmer sells 7.7 kilograms of apples and pears.3/5 of this weight is apples, and the rest is pears. How many kilograms of pear

kompoz [17]

Answer:

The weight of pears is 3.08 kg

Step-by-step explanation:

A farmer sells 7.7 kilograms of apples and pears.

3/5 of this weight is apples.

This means that the weight of apples is:

3/5 of 7.7

=> $\frac{3}{5} * 7.7 = 4.62kg$

The weight of apples is 4.62 kg.

The weight of pears will therefore be:

$7.7 - 4.62 = 3.08 kg$

The weight of pears is 3.08 kg.

6 0

3 years ago

Write the difference 20 – (–48) as a sum. Then simplify.

Salsk061 [2.6K]

Answer:

20-1(-48)Distribute

20 + 48 add

68

4 0

3 years ago

Read 2 more answers

(8x- 1) (11X - 25) (15y - 48)

Leona [35]

Answer:

1320x^2y−4224x^2−3165xy+10128x+375y−1200

Step-by-step explanation:

(8x−1)(11x−25)(15y−48)

=((8x−1)(11x−25))(15y+−48)

=((8x−1)(11x−25))(15y)+((8x−1)(11x−25))(−48)

=1320x2y−3165xy+375y−4224x2+10128x−1200

=1320x^2y−4224x^2−3165xy+10128x+375y−1200

3 0

2 years ago

A substance has a density of 0.70 g/mL, if it has a volume of 3.0 mL, what is its mass?

Naddika [18.5K]

Answer:

<h2>2.1 g</h2>

Step-by-step explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 0.70 × 3

We have the final answer as

<h3>2.1 g</h3>

Hope this helps you

4 0

3 years ago