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3 years ago

Who can help me with these I really need help if u can explain and give answers I will appreciate it.

Mathematics

1 answer:

Tpy6a [65]3 years ago

5 0

Hi there!

Question 6)

The scale is 1 cm : 18km.

This means that for every 1 cm, there is 18 km

So, we are going to set it up like a proportion:

cm 1 9
km 18 x

Now we are going to cross multiple:

1*x=9*18

Solve for x:
x=152

Therefore, the answer is 152 km

question 8)

Yet again we have a proportion problem.

15 10
18 x

15x=180

x=12ft

Therefore, the answer is 12 feet.

Question 10)

This question is just like the other one!

3. 6
7. x

3x=42

x=14

Therefore, the answer is 14 feet

________________________

Hope this helps! Let me know if you have any questions!

You might be interested in

Four-thirds times the sum of a number and 8 is 24. what is the number?

labwork [276]

So first you take the words and put them into an equation. "a number" that never gets directly told to you will always be a variable, which is easiest to make X. "The sum of a number and 8" will mean that 8+something is the sum so they have to go in parenthesis... giving you
4/3*(x+8)=24
now just solve for X, remembering to use the reverse of PEMDAS, since you're solving for the variable.
remove what is furthest away to the X first.
x+8=24*3/4
x+8=18
x=18-8
x=10
Now, remember to always go through and replace your variable with its value and solve. if it is not equal on both sides, retry the problem because you may have missed a small +, -, or * somewhere!

Hope this helped:)

8 0

3 years ago

Write an equation of the line that passes through the given point and is (a) parallel and (b) perpendicular to the given line.

Harrizon [31]

Answer:

Equation of the line that passes through the given point and is (a) parallel is: $\mathbf{y=-2x+11}$

Equation of the line that passes through the given point and is (b) perpendicular is: $\mathbf{y=\frac{1}{2}x+1}$

Step-by-step explanation:

We need to Write an equation of the line that passes through the given point and is (a) parallel and (b) perpendicular to the given line.

First we will find slope of the line given in graph

The slope can be found using formula: $Slope=\frac{y_2-y_1}{x_2-x_1}$

We have points (1,6) and (2,2)

Slope is:

$Slope=\frac{y_2-y_1}{x_2-x_1}\\Slope=\frac{2-6}{2-1}\\Slope=\frac{-4}{2}\\Slope=-2$

Part a)

Write an equation of the line that passes through the given point and is (a) parallel

When the lines are parallel, they have same slope. So, slope of required line: m = -2

Using slope m =-2 and point(4,3) we can find y-intercept b

$y=mx+b\\3=-2(4)+b\\3=-8+b\\b=3+8\\b=11$

The equation of line will be:

$y=mx+b\\y=-2x+11$

Equation of the line that passes through the given point and is (a) parallel is: $\mathbf{y=-2x+11}$

Part b)

Write an equation of the line that passes through the given point and is (b) perpendicular

When the lines are perpendicular they have opposite slope. So, slope of required line: m = 1/2

Using slope m =1/2 and point(4,3) we can find y-intercept b

$y=mx+b\\3=\frac{1}{2}(4)+b\\3=2+b\\b=3-2\\b=1$

The equation of line will be:

$y=mx+b\\y=\frac{1}{2}x+1$

Equation of the line that passes through the given point and is (b) perpendicular is: $\mathbf{y=\frac{1}{2}x+1}$

6 0

3 years ago

Can someone plz help me? :(

Delicious77 [7]

Answer:

it is C! if I were to write t<6 on a number line it would be open circle above 6 and going to the left since it is smaller than 6!

8 0

2 years ago

How to estimate 5x179

QveST [7]

Answer:

895

Step-by-step explanation:

if u need to estimate, multiple 5 by 180, and then subtract 5

6 0

3 years ago

Please help me!Its really important

olga2289 [7]

The answer to this question would be B. 5 2/4 hours. We can figure this out by adding up all of the times that were marked in the chart.
I hope this helped! :-)

5 0

3 years ago