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astra-53 [7]
3 years ago
14

The sum of a number and 4.8 is three times the number. Find the number

Mathematics
2 answers:
Ksivusya [100]3 years ago
4 0

Answer:

The answer is Z = 2.4

Step-by-step explanation:

Let the number be Z

Z + 4.8 = 3 × Z

Z + 4.8 = 3Z

Collect like terms

4.8 = 3Z - Z

4.8 = 2Z

Z = 4.8/2

Z = 2.4

Degger [83]3 years ago
4 0

Answer:

The number is 2.4

Step-by-step explanation:

Let the number be y

The sum of the number and 4.8 is written as: y + 4.8

Three times the number is written as: 3y

From the question, we were told that the sum of the number and 4.8 is three times the number. This is illustrated as:

y + 4.8 = 3y

Collect like terms

4.8 = 3y — y

4.8 = 2y

Divide both side by the coefficient of y i.e 2

y = 4.8/2

y = 2.4

The number is 2.4

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Please sketch graph of the function f(x) = |x+2|.
Burka [1]

Answer:

The absolute value can be graphed using the points around the vertex (-2, 0), (-4, 2), (-3, 1), (-1, 1), (0, 2).

Step-by-step explanation:

The find the x coordinate of the vertex, set the inside of the absolute value x + 2 equal to 0. In this case, x + 2 = 0.

x + 2 = 0

Subtract 2 from both sides of the equation.

x = -2

Replace the variable x with -2 in the expression.

y = |(-2) + 2|

The absolute value vertex is (-2, 0).

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

For each x value, there is on y value. Select few z values from the domain. It would be more useful to select the values so that they are around the x value of the absolute value vertex.

Substitute the x value -4 into f(x) = |x+2|. In this case, the point is (-4,2).

y=2

Substitute the x value -3 into f(x) = |x+2|. In this case, the point is (-3,1).

y=1

Substitute the x value 0 into f(x) = |x+2|. In this case, the point is (0,2).

y=2

You can find the graph in the attachment.

6 0
3 years ago
A bag contains 40 marbles. The probability of selecting a red marble at random is 1/5. How many red marbles are in the bag?
goblinko [34]

Answer:

8 red marbles.

Step-by-step explanation:

All together we have 40 marbles. The fraction of marbles that are red is 1/5 which means that we should divide the total number of marbles, which is 40 by the denominator ( Bottom number of fraction ) 5 so that we get the number of groups that have 1 red marble in them. In this case we have 8 groups.

40/5=8

You always divide by the denominator ( Bottom number of fraction ) first and then you multiply your answer by the numerator ( Top number of fraction ) .

If each group has 1 red marble in it and we have 8 groups, it means that we have 8 red marbles in the bag.

1 * 8 = 8 red marbles in the bag

If the numerator (number above the fraction line) was more than one, then this would mean that we have more than 1 marble in each group of marbles.

Example:

If we had 3/5 we would have 3 marbles in each group of marbles. This means that instead of doing 1 * 8 we would have to do 3 * 8 = 24. We would have 24 red marbles in the bag.

Easy and quick way if you do not need the explanation:

Another way we could do this is by simply multiplying the fraction ( 1/5 ) by the total number of marbles ( 40 ). This would still give us an answer of 8 red marbles in the bag. 40/5=8, 8*1=8

7 0
3 years ago
7. If the concert handed out 208 wands and some wands were red wands and some were green wands. The ratio of red wands to green
umka21 [38]

Answer:

red = 52

Green = 156

Step-by-step explanation:

The 208 has to be divided by 4.

Three wands = 3 parts

The read wands = 1

3x + x = 208               Combine terms

4x = 208                     Divide by 4

x = 208/4

x = 52

Now the red wands = 52

The Green wand<u>s   =156</u>   (3 times 52)

Total                           208    Just as it should

4 0
3 years ago
Find the first three terms of the sequence below.<br> T, = n2 + 2n +9
NikAS [45]

Answer:

12, 17, 24

Step-by-step explanation:

To find the first 3 terms, substitute n = 1, 2, 3 into the rule, that is

T₁ = 1² + 2(1) + 9 = 1 + 2 + 9 = 12

T₂ = 2² + 2(2) + 9 = 4 + 4 + 9 = 17

T₃ = 3² + 2(3) + 9 = 9 + 6 + 9 = 24

7 0
3 years ago
Read 2 more answers
The cost of the paint was $39 per gallon, so if the cost is $4,368, how many gallons did you buy?
OLga [1]
<em>The answer is 112, or A. $4368 divided by $39 is 112.</em>
5 0
3 years ago
Read 2 more answers
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