(4 ten thousands 6 hundreds) ×10=

11..

lozanna [386]

Answer:

D. n= 0 or n= 4/5

Step-by-step explanation:

Factor and set each factor equal to zero.

n

=

0

,

4

5

Isolate the variable by dividing each side by factors that don't contain the variable.

Exact Form:

n

=

0

,

4

5

Decimal Form:

n

=

0

,

0.8

4 0

2 years ago

A store sells black ink pens for $5 and red ink pens for $4. John wishes to buy 20 pens but doesn’t wish to spend more than $92.

Zina [86]

Answer: $4r + 5(20-r) \le 92$

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

Explanation:

r = number of red pens

4r = cost of buying r red pens

example: if r = 10, then 4r = 4*10 = 40 is the total cost of buying 10 red pens

If John buys r red pens, then he must buy 20-r black pens so that r and 20-r add to 20.

John buys 20-r black pens, and at $5 each, so it will cost 5(20-r) dollars for just the black pens alone.

In total, John spends 4r + 5(20-r) dollars for all the pens (red & black)

We want $92 be the most he spends. This is the ceiling or highest value possible.

Therefore,

$4r + 5(20-r) \le 92$

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

Extra info:

If you want to solve for r, then

$4r + 5(20-r) \le 92$

$4r + 5(20)+5(-r) \le 92$ distribute

$4r + 100 - 5r \le 92$

$100 - r \le 92$

$100-r+r \le 92+r$ add r to both sides

$100 \le 92+r$

$100-92 \le 92+r-92$ subtract 92 from both sides

$8 \le r$

$r \ge 8$

So John must buy at least 8 red pens. The most he can buy is 20 red pens since he wants 20 pens total.

8 0

2 years ago

What is the missing value in the equation <br><br>__ x 1\10 = 0.026

AleksAgata [21]

0.26 * 1/10 = 0.026

because 1/10 = 0.1
0.26 * 0.1 = 0.026

5 0

3 years ago

Read 2 more answers

A research company desires to know the mean consumption of milk per week among males over age 25. A sample of 650 males over age

Advocard [28]

Answer:

$3.3\leq x\leq 3.5$

Step-by-step explanation:

The 95% confidence interval can be calculated as:

$x'-z_{\alpha/2}\frac{s}{\sqrt{n}} \leq x\leq x'+z_{\alpha/2}\frac{s}{\sqrt{n}}$

Where $x$ is the mean consumption of milk, $x'$ is the sample mean, $s$ is the population standard deviation, $n$ is the size of the sample, $\alpha$ is 5% and $z_{\alpha /2}$ is the z-value that let a probability of $\alpha /2$ on the right tail.

So, replacing $x'$ by 3.4 liters, $s$ by 1.3 liters, n by 650 and $z_{\alpha /2}$ by 1.96, we get that the 95% confidence interval is equal to:

$3.4-(1.96*\frac{1.3}{\sqrt{650}})\leq x\leq 3.4+(1.96*\frac{1.3}{\sqrt{650}}) \\3.4-0.1\leq x\leq 3.4+0.1\\3.3\leq x\leq 3.5$

4 0

3 years ago

Read 2 more answers

Charles wanted to graph the amount of sugar (in teaspoons) used in cups of coffee at a schoolevent. He used the coffee and sugar

AysviL [449]

Answer:

Its a

Step-by-step explanation:

8 0

2 years ago