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Andreyy89
3 years ago
11

The product of 7 and a number is at least 30

Mathematics
1 answer:
Greeley [361]3 years ago
5 0

Let x be the number multiplied by 7.

We get 7x.

At least 30 means GREATER THAN OR EQUAL TO 30 or ⩾ 30.

Put it all together now.

7x ⩾ 30

Divide both sides by 7.

x ⩾ 30/7

Done!

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Least common denominator of 6/7 and 5/14
Darya [45]

Answer:

14

Step-by-step explanation:

You can‘t simplify 5/14 because 5 is a prime number. So, now you have to convert the 6/7 to 12/14 to match it up to 5/14. They now have a common denominator of 14.

Hope this helps! :)

5 0
3 years ago
A point has zero dimension. True or False?
djverab [1.8K]

Answer:

True

Step-by-step explanation:

A point is zero-dimensional with respect to the covering dimension because every open cover of the space has a refinement consisting of a single open set.

7 0
3 years ago
Read 2 more answers
Find the sum of each set of numbers, as well as the size n of each set of numbers (n = number of numbers in the set). Use these
guapka [62]

We have to add numbers without a calculator.

1) 25, 35, 19, 31

We can group them by the last digit, so they are easy to add:

25 + 35 = 20 + 30 + 5 +5 = 50 + 10 = 60

19 + 31 = 10 + 30 + 9 +1 = 40 + 10 = 50

Then, 60 + 50 = 110

numbers in the set n = 4

Sum = 110

2) 101, 73, 49, 27, 24, 36

We can group them again by the last digit (adding 10, like the previous example).

We can substract the last digit from one number and add it to the other one. The result will be the same, but they will become easier to add.

101 + 49 = 100+50 = 150

73 + 27 = 70 + 30 = 100

24 + 36 = 20 + 40 = 60

150 + 100 + 60 = 250 + 60 = 310

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3) 25, 25, 25, 30, 30, 30, 32, 32, 32

In this case we have 3 times the same numbers, so we can add the three different numbers and then multiply the total by 3.

We can use the properties of the multiplication to simplify the product (we will use the distributive property)

25 + 30 + 32 = 27 + 30 + 30 = 87

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8 0
1 year ago
​The graph passes through the point (20, 6). What is the meaning of this point in the context of the situation?
Aliun [14]

Answer:

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Step-by-step explanation:

Let

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y ----> the distance remaining in kilometers

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That means

x=20 min

y=6 km

so

After 20 minutes, Shari had 6 kilometers left to run

4 0
3 years ago
if the measure of the third angle of the triangle is 20 more than three times the measure of either of the other two angles, fin
valentina_108 [34]
You should multiply  20 time 8 to get your answer
5 0
3 years ago
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