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3 years ago

8

You have a total of 21 pens and pencils on your desk. You have 3 more pens than pencils. Write a system linear equations that re

present this situation. How many of each do you have?

1 answer:

labwork [276]3 years ago

4 0

Answer:

x + y = 21x - y = 3

Step-by-step explanation:

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John made 12 dollars per delivery plus a base pay of 30 dollars. If he made 150 dollars, how

Tasya [4]

Answer:

he did 10 delivery

Step-by-step explanation:

if john gets 12 per delivery and gets 30 base pay that means

150-30=120

120/12=10

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3 years ago

10(8x^2-8x)<br> 10(8x <br> 2<br> −8x)

Law Incorporation [45]

Answer: 6400<em>x²</em> · (<em>x - 1)²</em>

The rule says: To multiply exponential expressions which have the same base, add up their exponents.

In our case, the common base is (x-1) and the exponents are:

1, as (x-1) is the same number as (x-1)1

And 1, as (x-1) is the same number as (x-1)1

The product is therefore, (x-1) (1 + 1) = (x-1)²

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3 years ago

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Equipment has been sorted into Baseballs and bats. The number of baseballs is four less than three times the number of bats. The

Ad libitum [116K]

80% and nbaseballws as well with 80%

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3 years ago

HELP ME WITH THIS QUESTION PLEASE

Shkiper50 [21]

Answer:

Step-by-step explanation:

1. 7x + 4

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3 years ago

An exterior angle of a regular convex polygon is 40°. What is the number of sides of the polygon?

seraphim [82]

Answer:

option B

Step-by-step explanation:

Sum of interior angles of a polygon with n sides:

$= (n - 2 )\times 180$

$Therefore, Each \ interior \ angle = (\frac{n - 2}{n} )\times 180$

$Sum \ of \ one \ of \ the \ interior \ angle \ with \ its \ exterior \ angle \ is \ 180^\circ$

$[ \ because \ straight \ line \ angle = 180^\circ \ ]$

That is ,

$Exterior \ angle + Interior \ angle = 180^\circ\\\\40^ \circ + (\frac{n-2}{n}) \times 180 = 180^\circ\\\\40 n + 180n - 360 = 180n\\\\40n = 180n - 180n + 360 \\\\40n = 360 \\\\n = 9$

OR

Sum of exterior angles of a regular polygon = 360

Given 1 exterior angle of the regular polygon is 40

Therefore ,

$n \times 40 = 360\\\\n = \frac{360}{40} \\\\n = 9$

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3 years ago