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3 years ago

Simplify 8 + 2(10 – r)

Mathematics

2 answers:

AleksandrR [38]3 years ago

7 0

8 + 2(10 - r)
Distribute: 2(10 - r)

8 + 20 - 2r
Evaluate: 8 + 20

Convert: -2r + 28

-2r + 28

mixer [17]3 years ago

6 0

Distribute
a(b+c)=ab+ac
2(10-r)=20-2r

now we have
8+20-2r
28-2r

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The client is to receive cyclophosphamide (Cytoxan) 50 mg/kg intravenously in divided doses over 5 days. The client weighs 176 p

marishachu [46]

Answer:

800 mg

Step-by-step explanation:

As the excerpt states that the client weights 176 pounds and is to receive cyclophosphamide (Cytoxan) 50 mg/kg, we have to convert 176 pounds to kg:

1 kg → 2.20 pounds

x ← 176 pounds

x= (176 pounds * 1 kg)/2.20 pounds= 80 kg

Now, we have to determine the total amount of cyclophosphamide (Cytoxan) that the client has to receive:

50 mg/kg

For 80 kg: 80 kg *50 mg/kg= 4,000 mg

As the dose is divided over 5 days:

4,000 mg / 5= 800 mg

The client will receive 800 mg of cyclophosphamide each day.

6 0

3 years ago

Multiplying binomials help please (10 points)

algol [13]

This is the answer 6x^2+15x+9

5 0

3 years ago

Read 2 more answers

Suppose we want to choose 3 objects, without replacement, from the 4 objects pencil, eraser, desk, and chair.

Crank

Answer:

4 ways of choosing

Step-by-step explanation:

If you want to choose 3 objects, without replacement, from the 4 objects which are distinct, then permutation i.e then their arrangement doesn't really matter. Only their combination will be considered

That means, order of choosing doesn't matter,

pencil/ eraser/ desk will be same as eraser/ desk/ pencil.

Number of ways of selecting 3 objects out of 4 distinct objects is:

⁴C₃ = $\frac{4 !}{3! \times (4-3)!}$

⁴C₃ = $\frac{4 \times 3 \times 2 \times 1}{3 \times 2 \times 1}$

⁴C₃ = 4

So, there are 4 ways of choosing

5 0

4 years ago

A parent volunteer group is raising money by making custom hats to sell at school activities they plan to sell the hats for $11

weeeeeb [17]

Answer:

(11 - 5)n - 50

Step-by-step explanation:

Cost of 1 hat = $5
Selling price = $11
Advertising = $50

Let the number of hats be n. Then money made is

<u>Profit for each hat:</u>

(11-5)

<u>Profit for n hats </u>

(11 - 5)n

<u>Deduct cost of advertisement - 50</u>

(11 - 5)n - 50

Option C is correct

6 0

3 years ago

Select the two values of x that are roots of this equation

Jet001 [13]

<h2>Hello!</h2>

The answers are:

B. $\frac{-3-\sqrt{29}}{2}$

C. $\frac{-3+\sqrt{29}}{2}$

We can use the quadratic equation to find the two values of x that are roots of the given equation. We must remember that most of the quadratic equations have two roots, however, we could find quadratic equations with just one root or even with no roots, at least in the real numbers.

Quadratic equation:

$\frac{-b+-\sqrt{b^{2}-4ac} }{2a}$

So,

From the given equation we have:

$a=1\\b=3\\c=-5$

Substituting it into the quadratic equation to find the roots, we have:

$\frac{-b+-\sqrt{b^{2}-4ac} }{2a}=\frac{-3+-\sqrt{3^{2}-4*1*-5} }{2*1}\\\\\frac{-3+-\sqrt{3^{2}-4*1*-5} }{2*1}=\frac{-3+-\sqrt{9+20} }{2}\\\\\frac{-3+-\sqrt{29}}{2}$

So,

$x_{1}=\frac{-3-\sqrt{29}}{2}\\\\x_{2}=\frac{-3+\sqrt{29}}{2}$

Hence, the correct options are B and C.

7 0

4 years ago