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Sidana [21]
3 years ago
9

-5×3+7×4-54÷9+2 ( step by step explanation pls do fast...)​

Mathematics
1 answer:
Nana76 [90]3 years ago
6 0

Answer:

9

Step-by-step explanation:

-5×3+7×4-54÷9+2

-5×3+7×4-6+2

-15+28-6+2

-15-6+28+2

-21+30

9

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1.4t-0.4(t-3.1)=5.8 please help !!
Svetllana [295]
Okay so i cant just post what the answer is i have to type something.
but anyways this is the answer: t= 4.56
4 0
3 years ago
When Jupiter and Earth are closest to each other, they are about 365 million miles apart. Express this distance in scientific no
SCORPION-xisa [38]

3.65 e8

Step-by-step explanation:

The scientific notation e mean ‘10 raised to a particular power’. Therefore e8 is equivalent to 10 ^ 8.

We count the number of tens to the decimal point. In this case;

365000000

3.65000000

The decimal is <u>8</u><u> place values </u>from the right (since this is a whole number)

6 0
3 years ago
Which describes how to calculate the range of this data set?
Helen [10]

Answer: subtract 12-4

Step-by-step explanation:

For the range you subtract the smallest number from the biggest number so 12-4.

6 0
2 years ago
What are the methods of substitution?
anyanavicka [17]

Answer:

-<u>One Equation</u>: is set equal to a variable

Example:

y = 2x + 1

x + 3y = -12

You already have y, plug it back into x + 3y = -12

x + 3(2x + 1) = -12

x + 6x + 3 = -12

7x + 3 = -12

(Subtract 3 from each side)

7x = -15

(Divide by 7)

x = - 2.14

-<u>No Equation</u>: is set equal to a variable

Example:

2x + y = 10

4× + 2y = -3

Subtract 2x from each side of 2x + y = 10, you should get y= -2x + 10. Now that you have found y, substitute y into 4x+ 2y = -3.

4x + 2(-2x + 10) = -3

4x + -4x + 20 = -3

(Subtract 20 from each side)

4x + -4x = -23

(Add 4x and -4x)

0 = -23

No Solution

<u>-Both</u><u> </u><u>Equations</u>: are set equal to a variable

Example:

y = x + 5

y = -x + 3

(you already have y so plug it into the other equation to solve for x)

-x + 3 = x + 5

(Add -x on both sides)

3 = 2x + 5

(subtract 5 from both sides)

-2 = 2x

(Divide by 2 on each side)

x = -1

I hope this helped!

8 0
3 years ago
Write an equation for the nth term of the geometric sequences. Then Find a6
love history [14]

Answer: The nth term of a geometric progression is Tn = ar^(n-1)

A. 12

B. 3.6

C. -3/4

D. 0.6

Step-by-step explanation:

The nth term of a geometric progression is Tn = ar^(n-1)

Where Tn= nth term

a = first term

r = common ratio

n = number

A. a6 = (2*6) = 12

B. a6 = (0.6*6) = 3.6

C. a6 = (-1/8*6) = -3/4

D. a6 = (0.1*6) = 0.6

6 0
3 years ago
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