His baby brother sleeps 21 hours.
There's a total of 24 hours in a day so you can divide by 8. That means 1/8 of the day is equal to 3 hours, so 7 times 3 hours equals 21 hours
x3 × x3 × x3 (I'm assuming you mean 3x for that) is equal to 9x^3. x3 × 3 × 3 is equal to 9x. They are not equivalent because one expression has 3x, 3 times, because you are multiplying the 3's together, and adding the x's three times, you get 9x^3. The x's are important since it differentiates between both expressions. 3x × 3 × 3, there is only one x in it, so it is just 9x. Does 9x=9x^3? No.
Answer:
B it will have to be 7 to make this true
Step-by-step explanation:
Answer:
$2,812.50
Step-by-step explanation:
Let
y ----> amount that Sarah earn this month
x ----> amount of sales over $5,750
we know that
5%=5/100=0.05
The linear equation that represent this situation is
y=4(525)+0.05(x)
Find the value of x
x=20,000-5750=$14,250
substitute
y=4(525)+0.05(14,250)=$2,812.50