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3 years ago

[PICTURE ATTACHED] sigh, another variability one. if u get it correct, i’ll make you brainliest! :’)

Mathematics

2 answers:

Dominik [7]3 years ago

7 0

Answer: B

Step-by-step explanation:

shtirl [24]3 years ago

3 0

Option B

How many books have each of my classmates read this year?

Step-by-step explanation:

Every year the number of books each classmate read would be different

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9) A heptagon has 6 exterior angles with measures of 47, 55, 62, 64, 54, and 49. What is the measure of the interior angle adjac

svetlana [45]

Answer:

seventh interior angle=∠x=29°

Step-by-step explanation:

sum of interior angle of polygon is equal to 360°

let seventh angle of heptagon is x

∠x+47°+55°+62°+64°+54°+49°=360°

∠x=360°-(47°+55°+62°+64°+54°+49°)

∠x=360°-331°=29°

∠x=29°

seventh interior angle=∠x=29° answer

6 0

3 years ago

2x +5y=10 writing equations in slope intercept form

rosijanka [135]

Answer: y=-2/5x+2

Solving Steps:
2x+5y=10 - Move the variable to the right
5y=10-2x - Divide both sides by five
y=2-2/5x - Reorder the terms
y=-2/5x+2

7 0

3 years ago

Three students are arguing over who can run the fastest. Student A says that she can run 2/3 mile in six minutes. Student B says

harkovskaia [24]

1/10

..............................

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3 years ago

Complete the dilation centered at A with a scale factor of 1/2.

ElenaW [278]

Answer:

A'=(5/2,-5/2)

therefore A'(2.5,-2.5)

Step-by-step explanation:

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3 years ago

The curve with equation y=ax^2+bx has a gradient of 3 at the point (2,-2). Find the values of a and b.

Airida [17]

Answer:

a = 2, b = - 5

Step-by-step explanation:

Given

y = ax² + bx

$\frac{dy}{dx}$ is the measure of the slope at x = a

Differentiate each term with respect to x using the power rule

$\frac{d}{dx}$ (a $x^{n}$ ) = na $x^{n-1}$

$\frac{dy}{dx}$ = 2ax + b, hence

2ax + b = 3 at (2, - 2)

Substitute x = 2 into $\frac{dy}{dx}$

4a + b = 3 → (1) and substitute x = 2 into y

4a + 2b = - 2 → (2)

Subtract ( 1) from (2)

b = - 2 - 3 = - 5

Substitute b = - 5 into (1)

4a - 5 = 3 ( add 5 to both sides )

4a = 8 ( divide both sides by 4 )

a = 2

7 0

3 years ago