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3 years ago

Approximate the answers:1.5435 x 7.312.5280 x 3.211

Mathematics

2 answers:

Zolol [24]3 years ago

4 0

Answer:

1) 39729.85

2)16954.08 or 423852

Approximated answer:

1) 40000 (rounded off to thousand)

or

39730 (rounded off to one)

2) 20000 (rounded off to thousand)

goldenfox [79]3 years ago

4 0

Answer:

Step-by-step explanation:

1.5435 x 7.31

1.5×7 = 10.5

Approximately 11

2.5280 x 3.211

2.5×3 = 7.5

Approximately 8

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Igoryamba

5 + (-10) = 5 - 10
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4 years ago

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3 years ago

Write the number 1.8 in the form a/b, using integers, to show that it is a rational number.

Pepsi [2]

1. Note that the number 1.8 consists of two parts 1 and 0.8.

2. The decimal 0.8 can be written as the fraction $\dfrac{8}{10}.$

3. Add these two numbers:

$1+\dfrac{8}{10}=\dfrac{10}{10}+\dfrac{8}{10}=\dfrac{10+8}{10}=\dfrac{18}{10}.$

4. Since 18=2·3·3 and 10=2·5, the fraction $\dfrac{18}{10}$ can be simplified to the rational number

$\dfrac{18}{10}=\dfrac{2\cdot 3\cdot 3}{2\cdot 5}=\dfrac{3\cdot 3}{5}=\dfrac{9}{5}.$

3 0

3 years ago

Read 2 more answers

Mary month earnings can be given as R(x)=13x+155 where x equals the number of hours worked josies monthly are given as Q(x)=9x+3

tatuchka [14]

Answer:

45hours

Step-by-step explanation:

Given

Mary month earnings to be R(x)=13x+155

Josies monthly earning is given as Q(x)=9x+335

If Josie and Mary work to earn the same salary, then R(x) = Q(x)

13x+155 = 9x+335

subtract 155 from both sides

13x+155-155 = 9x+335-155

13x = 9x+180

subtract 9x from both sides

13x-9x = 9x+180-9x

4x = 180

x = 180/4

x = 45

Since x equals the number of hours worked by Josie and Mary, this means that Josie and Mary must work for 45hours to earn the same salary

6 0

3 years ago

Which factors can be multiplied together to make the trinomial 5x^2+8x-4

Kitty [74]

Answer:

Step-by-step explanation:

hello :

5x²+8x-4 quadratic expression when : a = 5 and b=8 and c= -4

∆ = b²-4ac ∆ = 8²-4(5)(-4) = 64 +80 = 144 = 12²

X1 = ( -b -√∆)/2a X1 = (-8-12)/10 = -20/10= -2

X2 =(-b+√∆)/2a X2 = (-8+12)/10 = 4/10 = 2/5

us factorisation : a(X-X1)(X-X2)

5x²+8x-4= 5(x+2)(x-2/5) = (x+2)(5x-2)

you can verify ; (x+2)(5x-2) = 5x²-2x+10x-4 = 5x²+8x-4

4 0

3 years ago

Approximate the answers:1.5435 x 7.312.5280 x 3.211​

Approximate the answers:1.5435 x 7.312.5280 x 3.211