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3 years ago

2x-3=-4x+-9 What does x equal?

Mathematics

1 answer:

VMariaS [17]3 years ago

5 0

2x-3=-4x+-9

2x-3=-4x-9

negative number and positive number= negative number

2x-3=-4x-9

2x+4x-3=-4x+4x-9

6x-3=-9

6x-3+3=-9+3

6x=-6

Divide by 6

6x/6=-6/6

x=-1

Check answer by using substitution method

2(-1)-3=-4(-1)+-9

-5=-4-9

-5=-5

Answer is x=-1

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12.48 milliliters of medicine were separated into doses of 4 mL each. how many doses were made?

ivolga24 [154]

The number of doses are $\boxed{\bf3}$ , if each dose quantity is 4 mL and total medicine is 12.48 mL.

Further explanation:

The total quantity of the medicine in millilitres is 12.48.

The quantity of one dose in millilitres is 4.

To find the number of doses possible from 12.48 millilitres quantity of medicine with each doses has 4 millilitres quantity is calculated by the use of division.

Here, dividend is the quantity of all medicine and divisor is the quantity of each doses.

Substitute, number 12.48 for dividend and number 4 for divisor then obtain the quotient by the use of division as shown below.

$\begin{aligned}4\mathop{\left){\vphantom{1{12.48}}}\right.\!\!\!\!\overline{\,\,\,\vphantom 1{{12.48}}}}\limits^{\displaystyle\hfill\,\,\, {3.12}} \hfill\\\,\,\,\,\,\,\underline{12 \downarrow }\hfill\\\,\,\,\,\,\,\,\,\,04\hfill\\\,\,\,\,\,\,\,\,\,\,\,\,\underline{4\downarrow } \hfill\\\,\,\,\,\,\,\,\,\,\,\,\,08\hfill\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\underline8\hfill\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,0\hfill\\\end{aligned}$

The quotient of the above division is 3.12.

The number of doses is always being in natural number.

It is observed that nearest natural number for 3.12 is 3.

Thus, the number of doses are $\boxed{\bf3}$ , if each dose quantity is 4 mL and total medicine is 12.48 ml.

Learn more:

1. Write an algebraic expression for the following word phrase the quotient of r and 12 brainly.com/question/1600376

2. What is 20÷2(5+5) brainly.com/question/365957

3. Ten hundredths in standard form brainly.com/question/228852

Answer details:

Grade: Junior School

Subject: Mathematics

Chapter: Division

Keywords:

12.48, millilitres, medicine, dose, 4 ml, each, made, Division, natural, quantity, division, kilogram, quotient, divisor, ml, subtract, equally

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3 years ago

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Compare and contrast alternate interior angles and<br> alternate exterior angles.

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Answer:

if lines are parralel then corresponding angles are congruent and alternate exterior angles are congruent. if lines are parralel, them same side interior angles are suplementary and same side exterior angles are suplementary

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3 years ago

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Select three ratios that are equivalent to 8:58:58, colon, 5. Choose 3 answers: Choose 3 answers: (Choice A, Checked) A 16:1016:

Snezhnost [94]

Answer:

I think the reference ratio given is wrong so the right one is

8:508:508:5

Step-by-step explanation:

Given that,

8:58:58:5

We want to find which of the option is equivalent to the given ration

Option A.

16:1016:1016:10

Divide each of the ration by

Then,

16÷2:1016÷2:1016÷2:10÷2

8:508:508:5

Option B

50:8050:8050:80

Divide through by 10

50÷10:8050÷10:8050÷10:80÷10

5:805:805:8

Option C

48:3048:3048:30

Divide through by 6

48÷6:3048÷6:3048÷6:30÷6

8:508:508:5

Option D

32:2032:2032:20

Divide through by 4

32÷4:2032÷4:2032÷4:20÷4

8:508:508:5

Option E

64:3564:3564:35

Divide through by 8

64÷8:3564÷8:3564÷8:35÷8

This doesn't have a factor

So the ratio still retain

64:3564:3564:35

So to analyse the solution,

I believe the reference ratio given is wrong, so I think the reference ratio about be 8:508:508:5

So, from the option, the equivalent to the given ratio are options A, C, and D

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Which of the following are independent pairs of events? Check all that apply.

Mila [183]

Answer:

A,D and E

Step-by-step explanation:

Intuitively speaking two events are independents when the occurrence of one event (A) does not exert influence over the event (B)

Symbolic speaking in terms of sets

P(A∩B)= P(A) * P(B)

Examining each alternative

A. Flipping two coins and having one show a head and the other show a head

Independent. Each flipping coin does not exert any influence on the other

B. Being sneezed on and catching a cold

Dependent. This sequence of events expresses cause consequences effects.

C. When rolling a pair of dice, getting a total of 6 and having one die show a 3

Dependent

Under these conditions, the second event is dependent since all we need is a sum of six, having the first dice showing three. The second one has to show three. So it does exert influence under the result.

D. Rolling a 4 on one die and rolling a 2 on another die

Independent. To get a 4 does not exert any influence on getting a 2 on another dice.

E. Seeing clouds and winning the lottery

Independent.

There is no influence seeing clouds and winning the lottery.

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The expression (4z + 3)(z - 2) is equivalent to

harkovskaia [24]

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