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Lelu [443]
3 years ago
12

-4.5[2x-(0.5-1.4)] simplify please helpp

Mathematics
1 answer:
Radda [10]3 years ago
7 0
We need to follow PEMDAS.

Parentheses is first.

0.5 - 1.4 = -0.9

Now, we need to re-write our expression.

-4.5 [ 2x - 0.9]

Apply the distributive property.

-4.5*2x - (-4.5 *0.9)
-9x - (-4.5)

-9x + 4.05

Final answer:    
-9x + 4.05
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5 0
3 years ago
Determine the first expression to evaluate in each problem (3+3)+6÷3+6
hram777 [196]
To know what to do first in a math problem we look to order of operations... PEMDAS stands for parentheses, exponents, multiplication, division, addition, and subtraction.  So to begin we look for parentheses... do we have any?  Why, yes, yes we do.  Let's work!

(3+3) + 6 / 3 + 6 =

Add 3+3 in the parentheses. Since there is nothing else, the parentheses can go away.

6 + 6 / 3 + 6 =

Now, any exponents? Nope... Multiplication? Nope... division?  Yes!  Let's go!

6 + 2 + 6 =

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3 0
3 years ago
Read 2 more answers
The base of a triangle is nine centimeters longer than the perpendicular height. If the area of the triangle is 180 square centi
Rom4ik [11]

Answer:

<em>The base is 24 cm long.</em>

Step-by-step explanation:

<u>Equations</u>

Let's call

b= base of the triangle

h=height of the triangle

The base is 9 cm longer than the height, thus:

b = h + 9

The area of the triangle is:

\displaystyle A=\frac{bh}{2}

\displaystyle A=\frac{(h+9)h}{2}

And its value is 180:

\displaystyle \frac{(h+9)h}{2}=180

Multiplying by 2:

(h+9)h=360

Operating:

h^2+9h-360=0

Factoring:

(h-15)(h+24)=0

The only valid positive solution is:

h = 15 cm

And b = h + 9 = 24

b = 24 cm

The base is 24 cm long.

7 0
3 years ago
Write 0.000000092 in scientific notation
Leya [2.2K]

9.2x10^-8

Move the decimal to the right 8 times. Since it is moved to the right, the exponent is negative.

3 0
3 years ago
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ella [17]

Answer:

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or

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Step-by-step explanation:

3x^4 + x^3 + 6x^2 + 2x

3x times 3x times 3x times 3x + x^3 + 6x times 6x + 2x

3x times 3x times 3x times 3x + x^3 + 3x times 2x times 3x times 2x + 2x

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3 years ago
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