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harkovskaia [24]
4 years ago
6

What is the answer to 15a + 9 =

Mathematics
2 answers:
Elena-2011 [213]4 years ago
5 0

Answer:

Step-by-step explanation:

Use distributive property

15a + 9 = 3*5*a + 3*3

           = 3 (5a + 3)

Alex777 [14]4 years ago
3 0

<em>Answer:</em>

<em>   </em>a=-\frac{3}{5}<em />

<em>Step-by-step explanation:</em>

15a-9=0\\\\15a=-9\\\\a=-\frac{9}{15} \\\\a=-\frac{3}{5}

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Mia has two cylindrical bird feeders. Her red bird feeder has a diameter of 10 inches and is 8.3 inches tall. What is the volume
Temka [501]

The volume of the red bird feeder will be equal to V=651.88 cubic inches

<h3>What is volume?</h3>

Volume is defined as the space occupied by any object in the three-Dimensions. All three parameters are required for the volume like length,width and height of the cube or Cuboid.

It is given that:-

Diameter = 10 inches

Height =  8.3 inches

Volume=?

Since the feeder is cylindrical so the volume will be calculated as:-

\rm Volume=\dfrac{\pi }{4}d^2H\\\\\\Volume=\dfrac{\pi }{4}(10)^2(8.3)\\\\\

V=651.88 cubic inches

Hence volume of the red bird feeder will be equal to V=651.88 cubic inches

To know more about Volume follow

brainly.com/question/1972490

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4 0
3 years ago
A printing company sells small packages of personalized stationery for $7 each, medium
Ahat [919]

Step-by-step explanation:

what's the question ? it does not say.

I assume it is "how many packages of what size were sold ?"

x = number of small packages

y = number of medium packages sold

z = number of large packages sold

x + y + z = 9

7x + 12y + 15z = 86

y = 3z

these are the 3 equations we get out of the question.

we put the third equation into the other two :

x + 3z + z = x + 4z = 9

7x + 12×3z + 15z = 7x + 36z + 15z = 7x + 51z = 86

it of this first equation we get

x = -4z + 9

and putting that into the other equation :

7×(-4z + 9) + 51z = 86

-28z + 63 + 51z = 86

23z = 23

z = 1

y = 3z = 3×1 = 3

x = -4z + 9 = -4×1 + 9 = -4 + 9 = 5

so, 5 small, 3 medium and 1 large packages were sold.

4 0
3 years ago
What is the area of the triangle?<br> 8<br> 4<br> 5
Tpy6a [65]

Answer:

16

Step-by-step explanation:

1/2 (perpendicular height × base)

1/2(4×8)

2×8

=16

3 0
3 years ago
Do two distinct lines always intersect at a point.
torisob [31]
The answer to the question above is "not always". Only two lines with solution intersect. There are other two types of systems of linear equation. One of which are those which do not intersect because of they are parallel. Lastly, there are also systems of lines that intersect indefinitely because basically the equations represent the same line. 
6 0
4 years ago
3/4 + 7/8 =??????????????????
Vsevolod [243]

Answer:

13/8

in decimal form it is 1.625

Step-by-step explanation:

3 0
3 years ago
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