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3 years ago

Explain why 4/10 ÷ 2 and 4/10 × 1/2 both equal 2/10

Mathematics

2 answers:

antoniya [11.8K]3 years ago

7 0

They are both equal to 2/10 because 4/10 divided by 2 is the same as 4/10 x 1/2

Vanyuwa [196]3 years ago

5 0

When you are multiplying something by 1/2, you only multiply the number by 1, then proceed to divide it by the remaining 2. It is equal because ÷2 and ×1/2 produce the same results

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I need help! I don’t understand

Shalnov [3]

Each week he earns $142.5 from his partime job plus $25 from chores and then saves 85% of that total ($167.5). 85x167.5 = 14237.5 divided by 100 = 142.375 which is 85% of what he earns each week. Then multiply that by 8 weeks to find his total on August 25th. The answer should be $1,139

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3 years ago

A padlock has a 4 digit key code

german

Where is the rest of the question?

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3 years ago

which equation represents an exponential function that passes through the point (2, 80)? f(x) = 4(x)5 f(x) = 5(x)4 f(x) = 4(5)x

pav-90 [236]

we know that

if the exponential function passes through the given point, then the point must satisfy the equation of the exponential function

we proceed to verify each case if the point $(2,80)$ satisfied the exponential function

case A $f(x)=4(x^{5})$

For $x=2$ calculate the value of y in the equation and then compare with the y-coordinate of the point

$f(2)=4(2^{5})=128$

$128\neq 80$

therefore

the exponential function $f(x)=4(x^{5})$ not passes through the point $(2,80)$

case B $f(x)=5(x^{4})$

For $x=2$ calculate the value of y in the equation and then compare with the y-coordinate of the point

$f(2)=5(2^{4})=80$

$80=80$

therefore

the exponential function $f(x)=5(x^{4})$ passes through the point $(2,80)$

case C $f(x)=4(5^{x})$

For $x=2$ calculate the value of y in the equation and then compare with the y-coordinate of the point

$f(2)=4(5^{2})=100$

$100\neq 80$

therefore

the exponential function $f(x)=4(5^{x})$ not passes through the point $(2,80)$

case D $f(x)=5(4^{x})$

For $x=2$ calculate the value of y in the equation and then compare with the y-coordinate of the point

$f(2)=5(4^{2})=80$

$80=80$

therefore

the exponential function $f(x)=5(4^{x})$ passes through the point $(2,80)$

therefore

the answer is

$f(x)=5(x^{4})$

$f(x)=5(4^{x})$

7 0

3 years ago

543,000,000,000,000 in Scientific notation

Zielflug [23.3K]

Answer:

5.43×10^14 or

$5 .43 \times 10^{14}$

Step-by-step explanation:

Scientific notation, the number must always be less than 10, in this case 5.43. The exponent represents how much times I moved the decimal point to the left.

8 0

3 years ago

F(x) = e^x/2 Find F(0). 1.36 1 0

Lelu [443]

Answer:

f(0)

= e^o/2

= 1/2

=0.5 it is the required answer

8 0

3 years ago

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