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WINSTONCH [101]
3 years ago
11

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

Mathematics
1 answer:
AleksAgata [21]3 years ago
8 0

Answer:

9

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:

(m + M)/2

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.

3 0
3 years ago
If n + 7 = 10, evaluate 2n - 2
Vedmedyk [2.9K]
N=10-7

n=3

Now

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4
5 0
2 years ago
What is the vertex of the equation, y= -3x^2+2x-7?
Genrish500 [490]

A

Given a quadratic in standard form : y = ax² + bx + c ( a ≠ 0 ), then

The x-coordinate of the vertex is

x_{vertex} = - \frac{b}{2a}

y = - 3x² + 2x - 7 is in standard form

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

y = - 3 (\frac{1}{3})² + 2 ( \frac{1}{3}) - 7

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vertex = ( \frac{1}{3}, - \frac{20}{3}) → A



4 0
3 years ago
Read 2 more answers
Solve 3[-x + (2 x + 1)] = x - 1.<br> x = 2
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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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=  > 2x =  - 4

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7 0
3 years ago
What percentage of 100 is 35
nika2105 [10]

Answer:

35%

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35÷100=0.35

and its equal to

35%

6 0
2 years ago
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