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3 years ago

Alex got 21 out of 26 on a maths test and Miall got 23 out of 30 for a science test. who got the highest percentage?

1 answer:

4 0

A 21 out of 26 is equal to about an 80%
A 23 out of 30 is equal to about 73%
So Alex scored a higher grade on the science test

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Point m is the midpoint of kL. M(1,-1) and L(8,-7. What are the coordinates of point k?

Phoenix [80]

Answer: (-6, 5)

Step-by-step explanation:

Use the Midpoint Formula: $\dfrac{(x_k, y_k)+(x_L,y_L)}{2}=(x_m, y_m)$

Separate the x's and y's and solve them individually:

$\dfrac{x_k+x_L}{2}=x_m\qquad \qquad \qquad \qquad\dfrac{y_k+y_L}{2}=y_m\\\\\\\dfrac{x_k+8}{2}=1\qquad \qquad \qquad \qquad \qquad \dfrac{y_k-7}{2}=-1\\\\\\x_k+8=2\qquad \qquad \qquad \qquad \qquad y_k-7=-2\\\\\\x_k\quad =-6 \qquad \qquad \qquad \qquad \qquad y_k\qquad =5$

So, the k-coordinate is (-6, 5)

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3 years ago

9(x+3)=3(3x+6)+9 how many solutions?

Slav-nsk [51]

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$9(x +3) = 3(3x + 6) + 9$

$9x + 27 = 9x + 18 + 9$

$9x + 27 = 9x + 27$

The two sides of this equation are exactly the same, so the above equation holds for any value of x , thus we have infinite solution for it.

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8 0

3 years ago

Q7. What would be the best next step in solving the following equation for x? 8x - 4 = 10

bagirrra123 [75]

Answer:

The next step would be adding -4 to the other side since it would cancel out -4

Step-by-step explanation:

8 0

3 years ago

Find the vertex of this parabola. y = -2x2 + 4x + 12

STatiana [176]

For this case we have the following equation:
$y = -2x ^ 2 + 4x + 12
$
Deriving we have:
$y = -2x ^ 2 + 4x + 12

y '= -4x + 4$
We match zero:
$-4x + 4 = 0
$
We clear the value of x:
$4x = 4

x = 4/4

x = 1$
Then, we substitute the value of x in the equation of the parabola:
$y = -2 (1) ^ 2 + 4 (1) + 12

y = -2 + 4 + 12

y = 14$
Thus, the vertex of the parabola is the ordered pair:
$(x, y) = (1, 14)$
Answer:
The vertice is:
$(x, y) = (1, 14)$

3 0

3 years ago

What are the disadvantages of fire

matrenka [14]

Can you provide more information? Where would the fire be? What type of fire?(wildfire, controlled fire) What is the purpose of the fire?

4 0

4 years ago

Read 2 more answers