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2 years ago

How do you write an algebraic expression for 3 times the sum of x and y squared plus 5 times the difference of 2x and y

Mathematics

1 answer:

Vika [28.1K]2 years ago

8 0

3(x+y2)+(5)2x-y
The two by the y is supposed to be squared just to let you know hopefully this helps you

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Dave can complete a sales route by himself in 4 hours. James can do the same job in 5 hours. How long will it take them to do it

Alexeev081 [22]

We can solve this problem by calculating the individual rate of working and equate it to their total rate of working.

If Dave can complete a sales route in 4 hours, then his working rate is

$\frac{1}{4}$

Also, if James can do it in 5 hours, then his working rate is

$\frac{1}{5}$

Let
$x$
be the hours that both will use to complete the sales route,

Then rate at which both completes this task is
$\frac{1}{x}$

Meaning if we add their individual rates we should get

$\frac{1}{x}$

That is;

$\frac{1}{4} + \frac{1}{5} = \frac{1}{x}$

The LCM is
$20x$

So let us multiply through with the LCM.

$20x \times \frac{1}{4} + 20x \times \frac{1}{5} =20x \times \frac{1}{x}$

$5x + 4x = 20$

We simplify to get,

$9x = 20$

Dividing through by 9 gives;

$x = \frac{20}{9}$

$x = 2\frac{1}{9}$

Therefore the two will complete sales route in
$2 \frac{1}{9}$
hours.

3 0

3 years ago

The length of a rectangle is 12 in. and the perimeter is 56 in. Find the width of the rectangle.

yuradex [85]

Answer:

W = 16 in

Step-by-step explanation:

P = 2L + 2W

56 = 2(12) + 2W

56 = 24 + 2W

56-24 = 2W

32 = 2W

W = 32/2

W = 16 in

Best regards

7 0

3 years ago

WILL GIVE BRAINLESS IF SOLVED!!!! reply

sweet-ann [11.9K]

2 BBC’s if that’s what the council agrees as fair punishment for lying cheating and spreading evil i just want to die

5 0

2 years ago

Place these measurements from least to greatest. 34cm, 613mm, 71cm, 5m

stepan [7]

34cm, 613mm, 71cm, 5m

8 0

3 years ago

I really need help plzzzzz

Sonbull [250]

ANSWER

D. rotation, translation, reflection

EXPLANATION

Dilation is not a rigid motion.

When the triangle is dilated the image triangle may become bigger ( magnification) or smaller (reduction).

When the scale factor is negative 1, a congruent triangle is obtained.

Hence dilation will not always produce a congruent triangle.

Rotation, reflection and translation are rigid motions and hence will always produce a congruent triangle.

8 0

3 years ago