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lakkis [162]
4 years ago
8

If the square root of 70 a rational number

Mathematics
1 answer:
Talja [164]4 years ago
7 0

Answer:

No, its not rational

Step-by-step explanation:

Since 70 is not a perfect square, it is an irrational number.

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Find the first term of the arithmetic sequence in which a38= -5 and the common difference is -2.9
mestny [16]

Answer:

102.3

Step-by-step explanation:

a_38 = -5

difference d= -2.9

We use general formula

a_n = a_1 + (n-1)d

WE make the formula for a_38 th term

Plug in 38 for n

a_{38} = a_1 + (38-1)d

Now plug in -2.9 for d and -5 for a_38

-5 = a_1 + (38-1)(-2.9)

-5 = a_1 - 107.3

Now add 107.3 on both sides

102.3 = a_1

option A is correct



3 0
3 years ago
Read 2 more answers
How are a common denominator and a common multiple alike and different
Darina [25.2K]
A common denominator is when 2 fractions have the same denominator and a common multiple is when two multiples have at least 1 number alike




Example: Common Denominator

4/10 6/10

Example: Common Multiple

2: 2,4,6,8,10,12
4: 4,8,12
8 0
3 years ago
Read 2 more answers
Jenny bought a wok for £9.60 in a 20% off sale. What was the price of the<br> wok before the sale?
emmasim [6.3K]

Answer:

£12

Step-by-step explanation:

9.60 = 80% times y.

9.60 = 0.8y

Then, divide each side by 0.8 to get the equation in shape to solve for y.

y = 9.60/0.8

y=12

4 0
4 years ago
What's x? How do u solve to get x
AlexFokin [52]
Will x mean <span>forming the plural of many </span>
5 0
4 years ago
paper plates came in packages of 24 or 30. Joann bought 9 packages and a total of 258 plates. how many packages did she buy? PLE
bixtya [17]
Okay, let's use x for the 24 page packages and y for the 30 page packages:
x + y = 9
x = -y + 9
Now here's the second equation:
24x+30y = 258
We can input y into our second equation:
24(-y + 9) + 30y = 258
-24y + 216 + 30y = 258
6y = 42
y = 7
9 - 7 = 2, so:
Joann bought 7 :30 paper pakages
and 2 :24 paper packages
5 0
3 years ago
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