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3 years ago

What is 15% of 60? Create a model to prove your answer.What is 15% of 60 ?

Mathematics

2 answers:

weqwewe [10]3 years ago

6 0

15% = 0.15

Multiply:

0.15 × 60 = 9

Answer = 9

Hope this helped☺☺

riadik2000 [5.3K]3 years ago

5 0

Find 15% of 60
====================================================================
SOLVING...

To find 15% of 60 just multiply 0.15 (note: 0.15 = 15%) by 60
0.15 x 60 = 9
or
15% x 60 = 9
(either way works)
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Your Answer - 9 is 15% of 60

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Pls help me out! I cant understand this!!!

il63 [147K]

Answer:

Part A: 480 ounces of water are left in the water tank.

Part B: he will drink 3 tanks of water in 30 days.

Step-by-step explanation:

Part A:

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=640 = 96 = 64

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7 0

3 years ago

Which of the following is a solution to 2cos2x − cos x − 1 = 0?

Pavel [41]

Answer:

Option A is correct.

Solution for the given equation is, $x = 0^{\circ}$

Step-by-step explanation:

Given that : $2\cos^2x -\cos x -1 =0$

Let $\cos x =y$

then our equation become;

$2y^2-y-1= 0$ .....[1]

A quadratic equation is of the form:

$ax^2+bx+c =0$ .....[2] where a, b and c are coefficient and the solution is given by;

$x = \frac{-b\pm \sqrt{b^2-4ac}}{2a}$

Comparing equation [1] and [2] we get;

a = 2 b = -1 and c =-1

then;

$y = \frac{-(-1)\pm \sqrt{(-1)^2-4(2)(-1)}}{2(2)}$

Simplify:

$y = \frac{ 1 \pm \sqrt{1+8}}{4}$

$y = \frac{ 1 \pm \sqrt{9}}{4}$

$y = \frac{ 1 \pm 3}{4}$

$y = \frac{1+3}{4}$ and $y = \frac{1 -3}{4}$

Simplify:

y = 1 and $y = -\frac{1}{2}$

Substitute y = cos x we have;

$\cos x = 1$

⇒ $x = 0^{\circ}$

and

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⇒ $x = 120^{\circ} \text{and} x = 240^{\circ}$

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8 0

3 years ago

Read 2 more answers

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Ray Of Light [21]

Answer:
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Explanation:
Before we begin, remember the following:
(-ve) * (-ve) = +ve
(-ve) * (+ve) = -ve
(+ve) * (+ve) = +ve
(+ve) * (-ve) = -ve
a² - b² = (a + b)(a - b)

Now, for the given:
(4x³ + 3x² - 6x) - (10x³ + 3x²)
First, we eill remove the brackets based on the rules mentioned above. This will give us:
4x³ + 3x² - 6x - 10x³ - 3x²
Now, we will combine like terms as follows:
(4-10)x³ + (3-3)x² - 6x
-6x³ - 6x
Taking -6x as a common factor:
-6x (x² - 1)
Factoring the bracket as difference between two squares will give us the final simplest form:
-6x (x + 1)(x - 1)

Hope this helps :)

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3 years ago

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3 years ago

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SVETLANKA909090 [29]

290
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3 years ago