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3 years ago

PLEASE HELP!!!!!

Mathematics

1 answer:

svetoff [14.1K]3 years ago

3 0

Answer: it’s 7/1”

Step-by-step explanation: just took it

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Which of the following expressions are equivalent to (6.2+6.2)+9.4(6.2+6.2)+9.4left parenthesis, 6, point, 2, plus, 6, point, 2,

ELEN [110]

Answer:

6.2 + (6.2 + 9.4) ⇒ A

6.2 - (-6.2 - 9.4) ⇒ E

Step-by-step explanation:

* Lets revise some definitions to solve the problem

- Associative property states that you can re-group numbers and you

will get the same answer [(a + b) + c = a + (b + c)]

- Additive inverse of a number means reverse the sign of the number

the additive inverse of x is -x

- The expression is (6.2 + 6.2) + 9.4

- We want to find which of the following expressions are equivalent

to this expression

- By using associative property we can write the expression as

6.2 + (6.2 + 9.4)

∴ (6.2 + 6.2) + 9.4 = 6.2 + (6.2 + 9.4)

- Multiply (-) by the additive inverse of number is the number itself

If a number is x and its additive inverse is -x, then (-) × (-x) = x

∵ -6.2 is additive inverse of 6.2

∵ (-)(-6.2) = 6.2

∵ -9.4 is additive inverse of 9.4

∵ (-)(-9.4) = 9.4

∴ 6.2 - (-6.2 - 9.4) = 6.2 + 6.2 + 9.4

∴ (6.2 + 6.2) + 9.4 = 6.2 - (-6.2 - 9.4)

* The answers are A and E

8 0

3 years ago

Write 59.5% as a decimal. * Your answer

Komok [63]

Answer:

0.0325

Step-by-step explanation:

3.25% = 3.25 over 100 or,

3.25%=3.25100

3.25 over 100 is the same as 3.25 divided by 100. Completing the division we get:

3.25 ÷ 100 = 0.0325

Therefore, we have shown that

3.25% = 0.0325

6 0

3 years ago

Find the slope of eac 7) y=-2x + 5

NARA [144]

Answer:

Step-by-step explanation:

Compare with y = mx + c

y = -2x +5

Slope m = -2

4 0

3 years ago

Read 2 more answers

A survey team is trying to estimate the height of a mountain above a level plain. From one point on the plain, they observe that

aliya0001 [1]

Answer:

5507.79 feet

Step-by-step explanation:

To find the height of the mountain, we can draw triangles as in the image attached.

Let's call the height of the mountain 'h', and the distance from the first point (31 degrees) to the mountain 'x'.

Then, we can use the tangent relation of the angles:

tan(34) = h/x

tan(31) = h/(x+1000)

tan(31) is equal to 0.6009, and tan(34) is equal to 0.6745, so:

h/x = 0.6745 -> x = h/0.6745

using this value of x in the second equation:

h/(x+1000) = 0.6009

h/(h/0.6745 + 1000) = 0.6009

h = 0.6009 * (h/0.6745 + 1000)

h = 0.8909*h + 600.9

0.1091h = 600.9

h = 600.9 / 0.1091 = 5507.79 feet

8 0

4 years ago

PLS HELP ITS AN EMERGENCY

anastassius [24]

The answer would be a

7 0

4 years ago