MATHEMATICS MIDDLE SCHOOL

Kira needs 3,000 milligrams of zinc for a science experiment. Which expression can be used to determine how many grams of zinc she needs? A. 1000 ÷ 3000
B. 1000 × 3000
C. 3000 ÷ 1000
D. 3000 × 100

Answers

Answer 1

Answer:

We know $1000\;mg=1\;g$ . Therefore, 3000 mg of Zinc is equivalent to

$(3000\;mg)/(1000) =3000/1000=3\;g$ .

Thus the correct answer is (C).

Answer 2

Answer: C is the correct answer.

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If f(x) = 6x-1, find f1(x)

Answers

Answer:

Inverse function are symmetric with respect to line y=x.

It can be written as:

$f(f^(-1))(x) = x$ and $f^(-1)(f)(x)$

Let's rewrite the given function notation by using y term.

f(x) = 6x-1

i.,e y = 6x-1

Let's solve this equation for x;

Add 1 to both sides we get;

y+1 =6x

Divide both sides by 6 we get;

$x = (y+1)/(6)$

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$y= (x+1)/(6)$

In the function notation:

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erica has only $5 and $10 in her wallet. If sge has 23 bills totaling $190, how many of each bill does she have?

Answers

15 10$ bills and 8 5$ bills

Answer:

$15

Step-by-step explanation:

Please anyone help me on this question

Answers

Answer:

a) 60

b) 0.24

c) 150

Step-by-step explanation:

a) P(green) = ⅕

Expected no. = 300 × ⅕

= 60

b) total = 300

P(purple) = 72/300

= 6/25 = 0.24

c) P(blue) = 45/300

= 3/20 = 0.15

Expected no.: 1000 × 0.15

= 150

8. "If a figure is a square, then it is a regular quadrilateral" Is this true or false? Explain.

Answers

True because it has 4 equal sides and 4 equal interior angles each measuring 90 degrees

It is true. The square has four equal side and angles or of it can be described as a rectangle with two adjacent sides and equal length.

Estimate each sum or difference 19.7-6.9=

Answers

19.7-6.9=12.8 and when you subtract that would be difference

Final answer:

To estimate the difference between 19.7 and 6.9, subtract 6.9 from 19.7 to obtain the answer which is 12.8.

Explanation:

The problem 19.7 - 6.9 is a mathematical operation involving subtraction. In order to find the solution, you must subtract 6.9 from 19.7 as performed using a mathematical method, which in turns gives you the answer 12.8. Therefore, estimated difference for 19.7 and 6.9 is 12.8.