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ddd [48]
2 years ago
6

Jamal starts work in January with a salary of RM 3650 per month.He gives 10% of his salary to his mother.How much money does Jam

al's mother recieve in a year? Give the answer correct to two significant figures
Mathematics
1 answer:
kati45 [8]2 years ago
3 0

Answer:

Earns 56,500

Tax 56,500 × 10/100

=5,650

Invest = 50,850 × 50/100

= 25,425

Food = 25,425 × 30/100

=7,627.5

Shopping = 17,797.5 × 20/100

=3,559.5

Remaining = 14,237.5

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Use the quadratic formula to solve the equation 2x^2+2x-4=0
const2013 [10]

Answer:

<h2>x = -2 or x = 1</h2>

Step-by-step explanation:

The quadratic formula for the quadratic equation ax² + bx + c = 0:

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

2x^2+2x-4=0\qquad\text{divide both sides by 2}\\\\x^2+x-2=0

a=1,\ b=1,\ c=-2

Substitute:

x=\dfrac{-1\pm\sqrt{1^2-4(1)(-2)}}{2(1)}=\dfrac{-1\pm\sqrt{9}}{2}=\dfrac{-1\pm3}{2}\\\\x_1=\dfrac{-1-3}{2}=\dfrac{-4}{2}=-2\\\\x_2=\dfrac{-1+3}{2}=\dfrac{2}{2}=1

4 0
3 years ago
Find the area of this figure
GarryVolchara [31]
The area of the figure would be 94 feet squared.

Square
BH=A
8*8=64

Triangle
BH/2=A
5*12/2=A
60/2=A
30=A

Entire figure
30+64=94

Hope this helps
7 0
3 years ago
Read 2 more answers
85 orders in 17 days = ? orders in 12 days
tamaranim1 [39]

Answer:

60

Step-by-step explanation:

Let the order be x

Solution

85/x= 17/12

1020=17x

1020/17=x

x=60

4 0
3 years ago
Please help. I got the 12 part can’t can’t seem to simplify the fraction bit.
Sati [7]
<h3>Answer: D)  12 & 3/8</h3>

Whole part = 12

Fractional part = 3/8

==============================================

Explanation:

For now, let's just focus on the fractional parts of each mixed number.

We have these fractions:

  • 1/4
  • 4/16
  • 3/8
  • 1/2

The 4/16 reduces to 1/4, so 4/16 = 1/4

So in reality, we have these fractional parts.

  • 1/4
  • 1/4
  • 3/8
  • 1/2

It's not a typo that I'm listing "1/4" twice.

The next step is to get everything to have the same denominator. That denominator is 8 (aka the LCD)

  • 1/4 = 2/8
  • 1/4 = 2/8
  • 3/8 = 3/8
  • 1/2 = 4/8

Adding those new fractions gets us:

(2/8)+(2/8)+(3/8)+(4/8) = (2+2+3+4)/8 = 11/8

Rewrite that as a mixed number

11/8 = (8+3)/8

11/8 = (8/8) + (3/8)

11/8 = 1 + 3/8

11/8 = 1 & 3/8

We get the result 1 & 3/8, where 1 is the whole part and 3/8 is the fractional part.

Keep in mind that all we've done so far is add up the fractional parts. We were ignoring the whole parts from each original mixed number.

If we add the whole parts (3,2,1,5) we get 3+2+1+5 = 11, which adds onto the previous whole part of 1 to get 12. So that's where the 12 comes from.

The fractional part 3/8 comes along for the ride to get 12 & 3/8 as the final answer, which is choice D.

-----------------

An alternative route you can take is to convert each original mixed number into an improper fraction, then add those improper fractions (don't forget to get the LCD), and lastly convert the result to a mixed number.

5 0
3 years ago
(a)Use differentiation to find the minimum value of f(x)= 3x^2 - 5x + 10 and the value(s) of x for which this minimum occurs.
elena-14-01-66 [18.8K]

Hi there!

Begin by differentiating f(x) using the power rule:

dy/dx = nxⁿ⁻¹

Therefore:

f(x) = 3x² - 5x + 10

f'(x) = 6x - 5

Set this equation equal to 0 to find the x-intercept:

0 = 6x - 5

5 = 6x

x = 5/6, which is where the graph goes from NEGATIVE to POSITIVE, so there is a MINIMUM at this value.

3 0
2 years ago
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