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3 years ago

Math question (working too, if possible)

Mathematics

1 answer:

Alecsey [184]3 years ago

7 0

0.015 x 600 =9 so more than expected

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-8-6(1+7a)=32+4a

Sophie [7]

Answer:

Step-by-step explanation:

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3 years ago

25 points!!! please help!! I will mark answer Brainliest!!!

Lorico [155]

Answer:

= 3/2

Step-by-step explanation:

V = 1/3 x area of base x h

So area of base = 3V/h

= 3(12) / 24

= 36/24

= 3/2

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3 years ago

Twice the difference of a number and 3 is equal to 5.

Natasha_Volkova [10]

Answer:

n = 4

Step-by-step explanation:

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3 years ago

In a certain city there are 4,000 youths between ages 16 and 20 years old who drive cars. If 560 of

Lubov Fominskaja [6]

Step-by-step explanation:

P = 560 / 4000

P = 0.14

There is a 14% probability.

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3 years ago

good evening! Can someone please answer this, ill give you brainliest and your earning 50 points. Would be very appreciated.

AVprozaik [17]

Answer:

Part 1

Set B

Part 2

We can use the FOIL method to multiply these expressions:

$\textsf{FOIL}: \quad(a+b)(c+d)=ac+ad+bc+bd$

However, as all the expression are in the format $(a+b)^2$ , we can use the shortcut: $(a+b)^2=a^2+2ab+b^2$

Part 3

Using the shortcut to find the products:

$\begin{aligned}\implies (x+5)(x+5)& =(x+5)^2\\ & =x^2+2(x)(5)+5^2\\ & =x^2+10x+25\end{aligned}$

$\begin{aligned}\implies (2x+9)(2x+9) & = (2x+9)^2\\ & = (2x)^2+2(2x)(9)+9^2\\ & = 4x^2+36x+81\end{aligned}$

$\begin{aligned}\implies (x+1)^2 & = x^2+2(x)(1)+1^2\\ & = x^2+2x+1\end{aligned}$

Part 4

A new example of a multiplication problem based on the structure of Set B is: $(3x+2)(3x+2)$

$\begin{aligned}\implies (3x+2)(3x+2) & = (3x+2)^2\\ & = (3x)^2+2(3x)(2)+2^2\\ & = 9x^2+12x+4\end{aligned}$

Part 5

An example of a multiplication problem that would NOT be included in Set B based on its structure is: $(x+2)(x-2)$

We cannot use the derived Set B shortcut (from part 2) to multiply this expression. Instead, we would have to use a different shortcut of "The Difference of Two Squares" to find the product of this example expression.

5 0

2 years ago