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Alborosie
3 years ago
7

Calculate: 0.3 of 14

Mathematics
2 answers:
jasenka [17]3 years ago
8 0

100% --> 14

30% --> x

100x = 420

x= 420/100

x=4.2


Ber [7]3 years ago
7 0

Answer:

The answer is 4.2

Step-by-step explanation:

Always remember that when they use the word of, it means you have to multiply. So 14 times 0.3 is 4.2

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A karate instructor earns $165 for teaching 3 classes. The instructor receives a 10% raise. How much the instructor earns, in do
Zarrin [17]

Answer:

A $60.50

Step-by-step explanation:

165 divided 3 = $55.00 per class

55.00 X 10% = 5.50 per class

55.00 + 5.50 = 60.50

8 0
3 years ago
Use the fact that 2 1/2 divide 1/8 =20 to find 2 1/2 divide 5/8
Tasya [4]

Answer:

4

Step-by-step explanation:

Given that 2\frac 1 2 \div \frac 1 8 =20

\Rightarrow \frac 5 2 \div \frac 1 8 =20

\Rightarrow \frac 5 2 \times 8 1 =20 \cdots(i)

Now, 2\frac 1 2 \div \frac 5 8 = \frac 5 2 \div \frac 5 8=\frac 5 2 \times \frac 8 5

This can be written as

\frac 5 2 \times \frac 8 5=\frac 5 2 \times \left( \frac 8 1 \times \frac 1 5\right) [as \frac 8 5=\frac 8 1 \times \frac 1 5]

=\left(\frac 5 2 \times \frac 8 1 \right)\times \frac 1 5

=20 \times \frac 1 5 [ by using equation (i)]

=4

Hence, 2\frac 1 2 \div \frac 5 8=4

7 0
2 years ago
Approximately how many times greater is 8.5×10^8 than 3.4×10^5
Greeley [361]
850000000 /<span>340000 = 2,500 times</span>
7 0
4 years ago
Read 2 more answers
What is the obtuse angle formed by hand of a clock at 9:10​
zubka84 [21]

Answer:

it would be 60 degrees

Step-by-step explanation: Every 5 minutes on a clock there is a big number, and there are 12 of those. 360/12 is 30 degrees, so every hour, the hour hand moves 30 degrees.

4 0
2 years ago
Find the minimum y-value on the graph of y=f(x)<br><br> F(x) = 7x^2 + 7 - 6
Kisachek [45]

Answer:

The minimum y-value is

y=-\frac{31}{4}  or  y=-7.75

Step-by-step explanation:

we have

f(x)=7x^{2}+7x-6

This is the equation of a vertical parabola open up

The vertex is the minimum y-value on the graph

Convert the equation into vertex form

Group terms that contain the same variable, and move the constant to the opposite side of the equation

f(x)+6=7x^{2}+7x

Factor the leading coefficient

f(x)+6=7(x^{2}+x)

Complete the square. Remember to balance the equation by adding the same constants to each side

f(x)+6+1.75=7(x^{2}+x+0.25)

f(x)+7.75=7(x^{2}+x+0.25)

Rewrite as perfect squares

f(x)+7.75=7(x+0.5)^{2}

f(x)=7(x+0.5)^{2}-7.75 ------> equation in vertex form

The vertex is the point (-0.5,-7.75)

therefore

The minimum is the point (-0.5,-7.75)

The minimum y-value is y=-7.75=-7\frac{3}{4}=-\frac{31}{4}

see the attached figure to better understand the problem

6 0
3 years ago
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