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3 years ago

Given that Q(x)=2x^2 +5x-3 find and simplify Q(a+h)-Q(a-h)

Mathematics

1 answer:

Semenov [28]3 years ago

5 0

Step-by-step explanation:

here is the answer. Feel free to ask for more.

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on a recent survey, 90% of those surveyed indicated they preferred walking to running. If 130 people preferred running to walkin

maks197457 [2]

Answer:

<u>145 people were surveyed</u>

Step-by-step explanation:

1. Let's review the information given to answer the question correctly:

Percentage that indicated they preferred walking to running = 90%

2. If 130 people preferred running to walking, how many people where surveyed?

For answering this question, we will use the Rule of Three simple, this way:

x = Number of people surveyed

90 * x = 130 * 100

90x = 13,000

x = 13,000/90

x = 144.44

But we need a whole number for an accurate answer, so we round the value of x to the next whole number.

<u>145 people were surveyed</u>

8 0

3 years ago

The graph plots four equations, A, B, C, and D: Line A joins ordered pair negative 6, 16 and 9, negative 4. Line B joins ordered

Margaret [11]

Answer:

The pair of equations which has (2,12) as its solution is,

equation B and equation C.

Step-by-step explanation:

According to the question,

equation of line A is $\frac {y - 16}{x + 6} = \frac {16 + 4}{-6 - 9}$

or, $\frac {y - 16}{x + 6} = \frac {-4}{3}$

or, $3y - 48 = -4x - 24$

or, 3y + 4x = 24 ------------------(1)

Now, the point (2, 12) doesn't satisfy (1). Hence, (2,12) is not a solution for the line A.

Equation of line B is, $\frac {y - 20}{x + 2} = \frac {20 - 0}{-2 - 8}$

or, $\frac {y - 20}{x + 2} = -2$

or, $y - 20 = -2x - 4$

or, y + 2x = 16 -----------------------------(2)

The point (2,12) is satisfied by (2). Hence, (2, 12) is a solution for line B.

Equation of line C is, $\frac {y + 6}{x + 7} = \frac {20 + 6}{6 + 7}$

or, $\frac {y + 6}{x + 7} = 2$

or, y + 6 = 2x + 14

or. y - 2x = 8 -----------------------------------(3)

The point (2, 12) is satisfied by (3). Hence, (2 , 12) is a solution for the line C.

Equation of line D is, $\frac {y - 20}{x - 7} =\frac {20 + 7}{7 - 0}$

or, $\frac {y - 20}{x - 7} = \frac {27}{7}$

or, 7y - 140 = 27x - 189

or, 7y - 27x = -49----------------------------------------(4)

The point (2, 12) is not satisfied by (4). hence, (2, 12) is not a solution of the line D

Hence, the pair of equations which has (2,12) as its solution is,

equation B and equation C.

6 0

4 years ago

In the expression below. n is an interger

zepelin [54]

Step-by-step explanation:

bro can you tell me in simplest format for the ans

6 0

3 years ago

Read 2 more answers

Pls Solve This! I'll give Brainilest and points! :D

Kruka [31]

Answer:

(8,3)

Step-by-step explanation:

because its ON the line and the line is dotted. if the line was solid it would be a solution but it is not because the line is dotted

4 0

3 years ago

a store buys CDs with $1 for each and sells them for 1.5 each how many CDs should they sell to earn $100

abruzzese [7]

67 CDS

100/1.5=^
Hope this helps!

6 0

3 years ago

Read 2 more answers