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3 years ago

Y = ( x - 6 ) ( 2x + 5 ) what is answer?

Mathematics

1 answer:

maksim [4K]3 years ago

8 0

Answer : 2x² - 7x - 30

Step-by-step explanation: Multiply the brackets out (first x * 2x then x * 5) (second -6 * 2x then -6 * 5) which will give you 2x² + 5x - 12x - 30. Take away 12 from 5 which gave you the negative 7.

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Please help me on step 4

Zigmanuir [339]

The beginning part of the question is missing and it says;

The measures of center can be used to summarize the number of pets that students own. Cameron asked eight of his classmates how many pets they own. The results are listed below.

1, 0, 2, 0, 3, 7, 0, 2, 4

Answer:

Median

Step-by-step explanation:

Let's rearrange the results from least to most.

0, 0, 0, 1, 2, 2, 3, 4, 7

Mode is the most occurring number which in this case is zero, so Cameron can't use that to convince his parents to get another pet.

Median is middle number and in this case is 2.

Mean is; sum of results/ number of results = 19/9 = 2.11

Thus, the best measure of tendency for Cameron to use is median.

7 0

3 years ago

What is the answer? and how?

VikaD [51]

Answer:

The math test had 10 equation questions and 16 vocabulary questions.

Step-by-step explanation:

Given:

Total number of questions in the math test = 26

Total marks of the math test = 100

Points for one equation question = 2

Points for one vocabulary question = 5

To Find:

The number of equation question and vocabulary question = ?

Solution:

Let the number of equation question be x and the number of vocabulary question be y

Then

x+y = 26--------------------------(1)

$x \times 2 + y \times 5 = 100$ ----------------------(2)

From equation (1), we get

x = 26-y-----------------------------(3)

Substituting (3) in (2), we get

$(26-y) \times 2 + y \times 5 = 100$

Now solving the above equation

$(52 -2y) +5y= 100$

$52-2y+5y= 100$

$52 +3y= 100$

$3y= 100-52$

$3y=48$

$y =\frac{48}{3}$

y=16

Substituting y =16 in eq(3),

x = 26-16

x= 10

7 0

3 years ago

An Arithmetic series has 20 terms. The first term is -81. The sum of all the terms is -480. Use the arithmetic sum formula to fi

timama [110]

Answer:

The last term is 33.

Step-by-step explanation:

Sn = (n/2)(a1 + L) where a1 = first term and L = the last.

So:

-480 = (20/2) ( -81 + L)

-480 = 10( L - 81)

L- 81 = -480 / 10 = -48

L = -48 + 81

L = 33.

4 0

4 years ago

Calculate the volume of the composite shape please please help giving brainliest!!

Ilya [14]

${\qquad\qquad\huge\underline{{\sf Answer}}}$

There are two hemispheres in there with radius 3 cm, so we can consider it as a whole one. and the other shape in between is Cylinder with radius 3 cm and height 4 cm.

Volume of whole ahape = volume of Cylinder + volume of sphere ~

Volume of sphere :

$\qquad \sf \dashrightarrow \: \cfrac{4}{3} \pi {r}^{3}$