All categories

3 years ago

Can someone show me the workings out for each of these three questions

Mathematics

1 answer:

Paul [167]3 years ago

3 0

(c) 5p + 7 = 12 - 3p

8p = 5

p = 5/8 = 0.625

5. (a)

7p + 2 = 5p + 8

2p = 6

p = 3

(b) 7r + 2 = 5r - 20

2r = -22

r = -11

You might be interested in

Can anyone solve this?

UkoKoshka [18]

Answer:

D) 26.04 ft

Step-by-step explanation:

Let's set up a equation with two ratios:

$\frac{miniature\ house}{real\ house}=\frac{miniature\ house}{real \ house}$

Plug in the given lengths into the equation:

$\frac{1in}{1.55ft}=\frac{16.8in}{x}$

We can solve this using cross multiplication (multiply the numerator of the first fraction by the denominator of the second and the numerator of the second by the denominator of the first):

$1x=16.8*1.55\\1x=26.04$

D) 26.04 ft

6 0

3 years ago

Read 2 more answers

This is rlly easy but Im to lazy to do it- I mark brainliest.

kkurt [141]

Answers:

A. 6 Large taxis = 42 seats 9 Small taxis = 36 seats = 78 seats in total

B. 6 Large taxis = $498 + 9 Small taxis = $450 498+450= $948

C. 5 Large taxis and 10 Small taxis

Step-by-step explanation:

A. 6 Large taxis = 42 seats 9 Small taxis = 36 seats = 78 seats in total

If I did 8 small taxis the total number of seats would be 74, so I did one small taxi more to make it fair. There would be seats for everyone but 3 seats extra

B. 6 Large taxis = $498 + 9 Small taxis = $450 498+450=948

C. 5 Large taxis and 10 Small taxis

While the more small taxis there are, the more cheaper it is for Max but the less seats there would be for 75 people, So I did 1 more small taxi and 1 less large taxi.

The total number of seats now is 75 seats which is perfect amount for 75 people

So the total cheaper cost would $915 while still maintaining a fair amount of seats which is 75

3 0

4 years ago

What is the lcm of 5, 7 and 10

suter [353]

Answer:

70 is the LCM of 5, 7 and 10.

Step-by-step explanation:

3 0

4 years ago

What is the radical form of each of the given expressions? Drag the answer into the box to match each expression.

postnew [5]

4 ^ (1/7 ) is the 7th root of 4 or the 3rd box

4 ^ (7/2) is 4 to the 7th power then the square root or the 2nd box

7 ^ (1/4) is the 4th root of 7 or the 4th box

7 ^ (1/2) is the square root of 7 or the 6th box

4 0

3 years ago

Read 2 more answers

Graph the functions on the same coordinate axis. {f(x)=−2x+1g(x)=x2−2x−3

NikAS [45]

Answer:

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

Step-by-step explanation:

Let us graph the two equations one by one.

1. $f(x)=-2x+1$

If we compare this equation with the slope intercept form of a line which is given as

$y=mx+c$

we see that m = -1 and c =1

Hence the slope of the line is -2 and the y intercept is 1. Hence one point through which it is passing is (0,1) .

Let us find another point by putting x = 1 and solving it for y

$y=-2(1)+1$

$y=-2+1 = -1$

Let us find another point by putting x = 2 and solving it for y

$y=-2(2)+1$

$y=-4+1 = -3$

Hence the another point will be (2,-3)

Let us find another point by putting x = -2 and solving it for y

$y=-2(-2)+1$

$y=+1 = 5$

Hence the another point will be (-2,5)

Now we have two points (0,1) ,(1,-1) , (2,-3) and (-2,5) we joint them on line to obtain our line

$g(x)=y=x^2-2x-3$

$y=x^2-2x+1-1-3$

$y=(x-1)^2-4$

$(y+4)=(x-1)^2$

It represents the parabola opening upward with vertices (1,-4)

Let us mark few coordinates so that we may graph the parabola.

i) x=0 ; $y=y=(0)^2-2(0)-3=0-0-3=-3$ ; (0,-3)

ii)x=-1 ; $y=(-1)^2-2(-1)-3=1+2-3=0$ ; (-1,0)

iii) x=2 ; $y=(2)^2-2(2)-3 = 4-4-3 =-3$ ;(2,-3)

iii) x=1 ; $y=(1)^2-2(1)-3 = 1-2-3 =-4$ ;(1,-4)

iii) x=-2 ; $y=(-2)^2-2(-2)-3 = 4+4-3 =5$ ;(-2,5)

Now we plot them on coordinate axis and line them to form our parabola

When we plot them we see that we have two coordinates (2,-3) and (-2,5) are common , on which our graphs are intersecting. These coordinates are solution to the two graphs.

3 0

4 years ago