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rewona [7]
4 years ago
15

Solve for x. x + 1/2 = 3/4 X=_______________________

Mathematics
2 answers:
SVETLANKA909090 [29]4 years ago
7 0
X = 1 / 4

1 / 4 + 1 / 2 = 0.75 = 3/4
Vikentia [17]4 years ago
3 0

Answer:

x=\frac{1}{4}

Step-by-step explanation:

In order to get the answer to this question you will have to subtract 1/2 on both sides:

x+\frac{1}{2} =\frac{3}{4}

Subtract 1/2 on both sides:

-\frac{1}{2} -\frac{1}{2}

Subtract 1/2 from 3/4:

\frac{3}{4} -\frac{1}{2}

Find the common denominator:

CD=4

2\times2=4

1\times2=2

=\frac{2}{4}

Do the same with the second fraction:

4\times1=4

3\times1=3

=\frac{3}{4}

Subtract the numerators:

3-2=1

Keep the denominator the same:

=\frac{1}{4}

x=\frac{1}{4}

Hope this helps.

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The table shows the heights of 40 students in a class.
Darya [45]

Answer

A. 129.3

B. The students ages can be any number within the ranges, so having the middle number wont represent the other possible heights.

Step by step

'h' is the number between the surrounding number, the first would be 122.

You need to multiply the hight by frequency of each one,

122x7 =854

126x8=1008

130x13=1690

134x9=1206

138x3=414

Add them up = 5172

5172/40 =129.3

4 0
3 years ago
The local park has a circular pond with a radius of 9 feet. What is the pond's circumference?
sergiy2304 [10]

Answer:

Using 3.14 as pi, the answer would be 56.52, and using just pi (as in the input on a calculator) would be 56.54867.

Step-by-step explanation:

The equation for circumference of a circle is C = πd, C representing the circumference and d representing the diameter. Since the equation shows the radius, the equation can also be C = 2πr, since the radius is half of the diameter. Multiply nine by two to get eighteen. 18 times 3.14 = 56.52.

8 0
3 years ago
A random sample of 28 statistics tutorials was selected from the past 5 years and the percentage of students absent from each on
SVEN [57.7K]

Answer:

Step-by-step explanation:

Hello!

X: number of absences per tutorial per student over the past 5 years(percentage)

X≈N(μ;σ²)

You have to construct a 90% to estimate the population mean of the percentage of absences per tutorial of the students over the past 5 years.

The formula for the CI is:

X[bar] ± Z_{1-\alpha /2} * \frac{S}{\sqrt{n} }

⇒ The population standard deviation is unknown and since the distribution is approximate, I'll use the estimation of the standard deviation in place of the population parameter.

Number of Absences 13.9 16.4 12.3 13.2 8.4 4.4 10.3 8.8 4.8 10.9 15.9 9.7 4.5 11.5 5.7 10.8 9.7 8.2 10.3 12.2 10.6 16.2 15.2 1.7 11.7 11.9 10.0 12.4

X[bar]= 10.41

S= 3.71

Z_{1-\alpha /2}= Z_{0.95}= 1.645

[10.41±1.645*(\frac{3.71}{\sqrt{28} } )]

[9.26; 11.56]

Using a confidence level of 90% you'd expect that the interval [9.26; 11.56]% contains the value of the population mean of the percentage of absences per tutorial of the students over the past 5 years.

I hope this helps!

7 0
4 years ago
You and your friends have decided to camp for a night. Your friend claims the perimeter of his tent is 7.5 metres.
Georgia [21]
Perimeter =8.2
the friend is incorrect
4 0
3 years ago
Write the slope-intercept form of the equation of the line described.
Zina [86]

Answer:

Slope intercept form: y=mx+b; where m is the slope and B is the y intercept

For 2 lines to be parallel they must have the same slope. Thus, the slope of the new line is going to be 1.

To find the y intercept plug in the slope and the x, y into the equation y=mx+b:

y=mx+b

y=1x+b

2=1(2)+b

2=2+b

0=b

b=0

Now that we have your slope and y intercept we can make the equation:

y=1x+0

y=x

Step-by-step explanation:

7 0
3 years ago
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