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Troyanec [42]
2 years ago
11

a 100 point test has x questions worth 2 points each and y questions worth 4 points each what is the total that is given

Mathematics
1 answer:
Vanyuwa [196]2 years ago
4 0
I think it is 8 but im not sure srry if rong

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13. What is the result of adding 5.4a + 7.1 and -1.28 - 6.3?
den301095 [7]

Answer:

C. 4.2a + 0.8

Step-by-step explanation:

Given:

The two binomials given for addition are:

5.4a+7.1 and -1.2a-6.3

Now, adding both the binomials, we get:

5.4a+7.1+(-1.2a-6.3)

Distributing the positive sign inside the second binomial, we get:

5.4a+7.1-1.2a-6.3

Now, combining like terms using the commutative property of addition, we get:

(5.4a-1.2a)+(7.1-6.3)

Simplifying the above expression, we get:

(5.4-1.2)a+0.8\\4.2a+0.8

Therefore, the resulting addition of the given binomials is 4.2a+0.8

Hence, option C is the correct answer.

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3 years ago
Compare one third to sixths
zhuklara [117]
In one third you would need 12 one thirds to make a whole sixth
6 0
3 years ago
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How do you do 6.39÷0.09
erica [24]
The Answer Is 71. I dont know how you do it on paper though
4 0
3 years ago
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Determine the area of a rectangle with length of (x+3) and a width of (x-7)
Musya8 [376]
X+3 * x-7
=x^2- 4x - 21
5 0
3 years ago
a line has a slope of -2/3 for a pair of points on the line. Find the missing coordinate if the points are (-1,y) and (4,7)
masha68 [24]

Answer:

The missing co-ordinate is: (-1,$ \frac{31}{3} $).

Step-by-step explanation:

Given the slope of a line and a point on it, we determine the equation of the line by slope - one point form.

Slope - one point form: (y - y₁) = m(x - x₁)

Where, (x₁,y₁) is the point passing through the line.

Here the slope is $ \frac{-2}{3} $ and the point (x₁,y₁) = (4,7).

Therefore the equation would be:

y - 7 = $ \frac{-2}{3} $(x - 4)

⇒  3y - 21 = -2x + 8

⇒                       2x + 3y - 29 = 0       is the equation of the line.

Now it is given that (-1,y) also passes through the line, this point should satisfy the equation.

⇒ 2(-1) +3y = 29

⇒ 3y = 31  i.e., y = $ \frac{31}{3} $

Therefore, the missing co-ordinate is:   (-1,$ \frac{31}{3} $).

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3 years ago
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