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I am Lyosha [343]
3 years ago
5

Subtract. ​ 7/8-(-3/8) ​ Enter your answer in the box as a fraction in simplest form?

Mathematics
2 answers:
fgiga [73]3 years ago
7 0
The answer is negative 1 1/4 
Effectus [21]3 years ago
4 0
Simple....

so you have: \frac{7}{8}-(- \frac{3}{8}  )

There's the law where if the number outside your parentheses is negative along with the number in the parentheses; it converts into positive...

-->>x-(-x)
--->>x+(+x)

This being said.....

\frac{7}{8} - (-\frac{3}{8} )

-->> \frac{7}{8} +(+ \frac{3}{8} )

-->>>\frac{10}{8}

But remember, you want to simplify it....

\frac{10}{8} = \frac{5}{4} (Decimal form..1.25)

Thus, your answer.
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Which of the following best describes the expression 3x + 2y + 8z?
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8 0
3 years ago
Need help for 12 please​
igomit [66]

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2 years ago
ahmed is sitting on a dock watching a float plane in a harbour. At a certain time, the plane is 350 m above the water and 470 m
Pavel [41]

Answer:

The angle of elevation of the plane measured from Ahmed is approximately 36.67°

Step-by-step explanation:

The given parameters of the float plane are;

The height of the float plane above the water, y = 350 m

The horizontal distance of the float plane from Ahmed, x = 470 m

Given that Ahmed is sitting on the dock, by the water, by trigonometric ratios, we have;

The height of the float plane, the distance of the plane from Ahmed and the line of sight forming the angle of elevation of the plane measured from Ahmed, form a right triangle

tan\angle X = \dfrac{Opposite \ leg \ length}{Adjacent \ Leg\ length}

Therefore

tan(\theta) = \dfrac{y}{x}

Where;

θ = The angle of elevation of the plane measured from Ahmed

y = The leg of the right triangle opposite the reference angle

x = The leg  of the right adjacent to reference angle

Therefore;

θ = arctan(y/x) which gives;

θ = arctan(350/470) ≈ 36.67°

The angle of elevation of the plane measured from Ahmed, θ ≈ 36.67°.

8 0
3 years ago
Which is the correct input-output table for the function f(x) = 3x2 - 1+4?
krok68 [10]

Answer:

the question is incorrect. please write your points as coordinates or scan the diagram.

4 0
2 years ago
Suppose x and y vary together such that y = 2 x + 11 . Suppose x varies from x = 2 to x = 8.5 .
Stells [14]

Answer:

a) x changes by 6.5 units

b) y changes by 13 units

Step-by-step explanation:

a. Over this interval, how much does x change by?

Initially, we have that x = 2.

In the end, we have that x = 8.5.

So x changes by 8.5-2 = 6.5 units

b. Over this interval, how much does y change by?

Initially, when x = 2, we have that y = 2x + 11 = 2*2 + 11 = 15

In the end, when x = 8.5, we have that y = 2*8.5 + 11 = 28

So y changes by 28 - 15 = 13 units

8 0
3 years ago
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