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bulgar [2K]
3 years ago
10

Double the expression 8x-3.55

Mathematics
2 answers:
kobusy [5.1K]3 years ago
7 0

16x-7.1 is the doubled version of that expression

Lapatulllka [165]3 years ago
7 0
Hi hope I can help the final answer of 8×-3.55 should equal to a total of -28.4
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How many and what type of solutions does the equation have?
Natali [406]
Let's solve the equation 2k^2 = 9 + 3k
First, subtract each side by (9+3k) to get 0 on the right side of the equation
2k^2 = 9 + 3k
2k^2 - (9+3k) = 9+3k - (9+3k)
2k^2 - 9 - 3k = 9 + 3k - 9 - 3k
2k^2 - 3k - 9 = 0

As you see, we got a quadratic equation of general form ax^2 + bx + c, in which a = 2, b= -3, and c = -9.
Δ = b^2 - 4ac
Δ = (-3)^2 - 4 (2)(-9)
Δ<u /> = 9 + 72
Δ<u /> = 81

Δ<u />>0 so the equation got 2 real solutions:
k = (-b + √Δ)/2a = (-(-3) + √<u />81) / 2*2 = (3+9)/4 = 12/4 = 3
AND
k = (-b -√Δ)/2a = (-(-3) - √<u />81)/2*2 = (3-9)/4 = -6/4 = -3/2

So the solutions to 2k^2 = 9+3k are k=3 and k=-3/2

A rational number is either an integer number, or a decimal number that got a definitive number of digits after the decimal point.

3 is an integer number, so it's rational.
-3/2 = -1.5, and -1.5 got a definitive number of digit after the decimal point, so it's rational.

So 2k^2 = 9 + 3k have two rational solutions (Option B).

Hope this Helps! :)
7 0
3 years ago
Read 2 more answers
Solve the inequality: PLS SHOW YOUR WORK PLEASE<br><br> -45 &lt; 5(p-2)
andrezito [222]

Step-by-step explanation:

Given

-45 < 5(p-2)

Dividing both sides by 5

9 < p - 2

Adding two on both sides

9 + 2 < p - 2 + 2

11 < p

or

p > 11

Hope it will help :)❤

3 0
3 years ago
Iliana is painting a picture. She has green, red, yellow, purple, orange, and blue paint. She wants her painting to have four di
ivanzaharov [21]

The number of ways for which she could pick four colours if green must be one of them is; 10 ways.

<h3>How many ways can she picks four colours if green must be there?</h3>

It follows from the task that there are 6 colours in total that she could pick from.

Hence, since she needs four colours with green being one of them, it follows that she only has 3 colours to pick from 5.

Hence, the numbers of possible combinations is; 5C3 = 10 ways.

Read more on combinations;

brainly.com/question/2280043

#SPJ1

5 0
1 year ago
What is ⅓ (1 third) times three??
RoseWind [281]

The answer to this problem is one because 1/3 3 times is 3/3 which is equal to one.

3 0
3 years ago
Read 2 more answers
Please look at the picture to answer the question.
Black_prince [1.1K]
X - 19 + x + 65 = 180.  180° equals a line, and therefore a linear pair.
Then, solve your equation.  2x = 134.  So, x = 67°.  67 - 19 = 48.  180 - 48 = 132.  The answer is A.
8 0
3 years ago
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