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Andrew [12]
2 years ago
6

Find the value of 7p – 3q when p= 8 and q = -5

Mathematics
2 answers:
EastWind [94]2 years ago
5 0

Step-by-step explanation:

7p – 3q

if p= 8 and q = -5

7(8)-3(-5)

56+15

=71

Morgarella [4.7K]2 years ago
4 0

Answer:

71

Step-by-step explanation:

7(8)-3(-5)

56-(-15)

71

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If y=8 when x =3, find y when x=45
Art [367]
Let's make things easier by simplifying things.

y = 8 and x = 3 is more likely to be understood as a ratio. So for the rest of the answer, their relationship would be represented as y:x

Thus: y:x = 8:3

The problem would be finding y when x = 45

Let us proceed on using the previous equation and substitute x with 45 which would look like this:

y:45 = 8:3

Ratios can also be expressed as fractions which would make things more understandable and easy to solve. So the new form of our equation would be like this:

y/45 = 8/3

Then we proceed with a cross multiplication where the equation becomes like as what is shown below:

3y = 45 * 8

From there, you can solve it by multiplying 45 and 8 then dividing the product with 3 to get y

3y = 360

y = 120

Another way of looking at the problem, especially problems like these, is to take the whole question or statement as an equation. it would probably look like this:

y = 8 when x = 3 : y = ? when x = 45

This would make you understand what approach you can use to solve the given problem.
5 0
2 years ago
Read 2 more answers
A test consists of 10 multiple choice questions, each with five possible answers, one of which is correct. To pass the test a st
Softa [21]

Answer:

0.006369

Step-by-step explanation:

Given that a test consists of 10 multiple choice questions, each with five possible answers, one of which is correct.

By mere guessing p = probability for a right answer = 1/5 =0.20

There are two outcomes and each question is independent of the other.

X no of questions right is Bin (10,0.20)

the probability that the student will pass the test

= prob of getting more than 60%

=P(X\geq 6)

=0.006369

8 0
3 years ago
A store marks up all of its items by 32%.
bagirrra123 [75]
Hi there

X+0.32x=82.5
Solve for x to get the cost price
1.32x=82.5
X=82.5/1.32
X=62.5 is the cost price

Hope it helps
3 0
3 years ago
Type the correct answer in each box. Use numerals instead of words.
Hatshy [7]

Answer:

(4,-3) and (-2,5)

Step-by-step explanation:


It was given that the points (-3,4) and (5,-2) are on the graph of the function f.


If g is the inverse function of f, then g will take the y-values as inputs and give the x-values as outputs.

Hence we will have the ordered pairs (4,-3) and (-2,5)

on g.


In other words, f and g are symmetric about the line y=x. This implies that when we reflect the points (-3,4) and (5,-2) in the line y=x we will obtain (4,-3) and (-2,5).


This point must lie on g.


8 0
2 years ago
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A cube can be unfolded into the net shown below. Find the total
melisa1 [442]

Answer:

23.9 mm

Step-by-step explanation:

A cube can be unfolded into the net shown below. Find the total

surface area of the cube.

23.9 mm

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3 years ago
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