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3 years ago

8.7+w=5.1 help me plz

Mathematics

2 answers:

MAVERICK [17]3 years ago

5 0

Answer:

w = - 3.6

Step-by-step explanation:

$w = - 8.7 + 5.1 \\ \\ w = - 3.6$

Delicious77 [7]3 years ago

4 0

Answer:

w = -3.6

Step-by-step explanation:

Simplifying

8.7 + w = 5.1

Solving

8.7 + w = 5.1

Solving for variable 'w'.

Move all terms containing w to the left, all other terms to the right.

Add '-8.7' to each side of the equation.

8.7 + -8.7 + w = 5.1 + -8.7

Combine like terms: 8.7 + -8.7 = 0.0

0.0 + w = 5.1 + -8.7

w = 5.1 + -8.7

Combine like terms: 5.1 + -8.7 = -3.6

w = -3.6

Simplifying

w = -3.6

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Leokris [45]

Answer:

A.This is the graph of the greatest integer function

E. f(-3.4)=-4

Step-by-step explanation:

The graph shown in the attachment is the parent greatest integer function.

f(x)=[x]

This takes any integer as an input and the output is the greatest integer less than the input.

For instance

f(4.9)=4 because 4 is the greatest integer less than 4.9

f(-3.4)=-4 because -4 is the greatest integer less than -3.4

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For instance f(3.4)=3 and f(3.9)=3

The correct options are A and E

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3 years ago

Radium-226 has a half-life of 1620 years. for a 150 gram sample, how many grams will remain after 200 years?

VashaNatasha [74]

Ah, yes

if you start with P amount of something and the half life is h units (in years) and the time elapsed is t (in years) then the amount left is A

the equation is
$A=P(\frac{1}{2})^\frac{t}{h}$

so
given
h=1620
P=150
t=200
so
$A=150(\frac{1}{2})^\frac{200}{1620}$
$A=150(\frac{1}{2})^\frac{10}{81}$
use your calculator
A≈137.69781917515g
about 138grams left

3 0

3 years ago

A light bulb consumes 5850 watt-hours in 3 days and 6 hours. How many watt-hours does it consume per day?

inessss [21]

Answer:

Step-by-step explanation:

Three days + 6 hours has 24*3 + 6 = 78 hours

You need only set up a proportion

5850 / 78 = x / 24 Multiply by 24

24 * 5850 / 68 = x

1800 watt hours / day

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