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Mila [183]
3 years ago
11

What is 1/2+2/5 what is the answer of this question

Mathematics
2 answers:
fomenos3 years ago
7 0

Answer:

9/10

Step-by-step explanation:

1/2 + 2/5

We need a common denominator of 10

1/2 *5/5 = 5/10

2/5*2/2 = 4/10

5/10 +4/10 = 9/10

lesantik [10]3 years ago
3 0

Answer:

9/10

Step-by-step explanation:

1/2 + 2/5

Multiply the 2 and 5

your new fractions are:

5/10 + 4/10

Do the maths,

9/10.

You might be interested in
When a baseball is thrown upward, its height is a function of time. If this function is given by formula h(t)=−16t^2+24t+5, what
nekit [7.7K]

Answer: the maximal height is 14.75 units of distance.

Step-by-step explanation:

We want to find the maximum height of the function

h(t) = -16*t^2 + 24*t + 5

In order to find the maximum, we need to find the value of t where the derivate of h(t) is equal to zero, then we evaluate our original function in that time.

The derivate of h(t) (or the vertical velocity) is:

h'(t) = 2*(-16)*t + 24 = -32*t + 24

we want to find the value of such:

0 = -32*t +24

32*t = 24

t = 24/32 = 0.75

Now we evaluate our height function in that value.

h(0.75) = -16*0.75^2 + 25*0.75 + 5 = 14.75 units

5 0
4 years ago
A student got 12 out of 15 questions correct on their quiz. What percent of the questions did the student get correct?
Nastasia [14]

Answer:

i think it would be 21 percent he got wrong so if he got 21 percent wrong it would be 79 percent right

Step-by-step explanation:

beacause if it was 10 question it would be 30 percent wrong since its 15 you divide it by 100 which would be 7 and 7 times 3 is 21

sorry if im wrong

7 0
3 years ago
Which word is NOT part of the definition of descriptive statistics? A. Analyzing B. Organizing C. Presenting D. Predicting
irinina [24]

Answer:

(D), Predicting.

Step-by-step explanation:

Descriptive statistics involves various methods of collection, analysis , presentation as well as the summarization of a data set. It is involved in understanding the characteristics of the data by measuring the central tendency and measure of dispersion. Thus, it could be concluded that the prediction of the data is not done by the descriptive statistics.

Hence, the correct option is (D), Predicting.

4 0
3 years ago
Need help pleaseI was bad at math in school so lwant to learn
aleksklad [387]

The probability of an event is expressed as

Pr(\text{event) =}\frac{Total\text{ number of favourable/desired outcome}}{Tota\text{l number of possible outcome}}

Given:

\begin{gathered} \text{Red}\Rightarrow2 \\ \text{Green}\Rightarrow3 \\ \text{Blue}\Rightarrow2 \\ \Rightarrow Total\text{ number of balls = 2+3+2=7 balls} \end{gathered}

The probability of drwing two blue balls one after the other is expressed as

Pr(\text{blue)}\times Pr(blue)

For the first draw:

\begin{gathered} Pr(\text{blue) = }\frac{number\text{ of blue balls}}{total\text{ number of balls}} \\ =\frac{2}{7} \end{gathered}

For the second draw, we have only 1 blue ball left out of a total of 6 balls (since a blue ball with drawn earlier).

Thus,

\begin{gathered} Pr(\text{blue)}=\frac{number\text{ of blue balls left}}{total\text{ number of balls left}} \\ =\frac{1}{6} \end{gathered}

The probability of drawing two blue balls one after the other is evaluted as

\begin{gathered} \frac{1}{6}\times\frac{2}{7} \\ =\frac{1}{21} \end{gathered}

The probablity that none of the balls drawn is blue is evaluted as

\begin{gathered} 1-\frac{1}{21} \\ =\frac{20}{21} \end{gathered}

Hence, the probablity that none of the balls drawn is blue is evaluted as

\frac{20}{21}

8 0
1 year ago
The coordinates of point A on a grid are (2, -5). Point A is reflected across the x-axis to obtain point B. The coordinates of p
kogti [31]

Answer:

5

Step-by-step explanation:

4 0
4 years ago
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