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3 years ago

5. Mark's brother is five years older than Mark.

Mathematics

1 answer:

AleksAgata [21]3 years ago

8 0

Answer:

Step-by-step explanation:

Let's say Mark is M and his brother is B.

M+5=B

M+B=23

Now we can solve using subsitution.

M+M+5=23

(Subtract 5 from both sides)

2M=18

M=9

Hope this helped!

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Math. Find Mid point and fx

Yakvenalex [24]

Answer: Option B.

Step-by-step explanation:

When we have an interval with lower bound m and upper bound M, such that:

m ≤ x ≤ M

The mid-point is:

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in this case, we have:

m = 22

M = 27

then the mid-point is:

(22 + 27)/2 = 24.5

and we know that f = 7, then:

f*x = f times the mid-point = 7*24.5 = 171.5

The correct option is B.

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3 years ago

If n + 7 = 10, evaluate 2n - 2

Vedmedyk [2.9K]

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2 years ago

What is the vertex of the equation, y= -3x^2+2x-7?

Genrish500 [490]

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The x-coordinate of the vertex is

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with a = - 3, b = 2 and c = - 7, hence

$x_{vertex}$ = - $\frac{2}{-6}$ = $\frac{1}{3}$

Substitute this value into the equation for y-coordinate

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3 years ago

Read 2 more answers

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Gekata [30.6K]

Answer:

x = -2

Step-by-step explanation:

$3[- x + (2x + 1)] = x - 1$

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$= > 3[x + 1] = x - 1$

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3 years ago

What percentage of 100 is 35

nika2105 [10]

Answer:

35%

You divide 35 to 100

35÷100=0.35

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35%

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2 years ago