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4 years ago

55 POINTS!!!!!!

Mathematics

1 answer:

vladimir1956 [14]4 years ago

5 0

A
c
d
b
c
a
hope it helped!

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The value of y is directly proportional to the value of x. When x=3.5, the value of y is 14. What is the value of y when x = 28?

inna [77]

Answer:

x = 7

Step-by-step explanation:

y = 14

14 x 2 = 28

Therefore:

3.5 x 2 = 7

7 0

3 years ago

A man drove x miles per hour for 3e hours and (2x-60) miles per hour for the next 4.75 hours. Express the total distance he trav

avanturin [10]

Answer:

A man drove x miles per hour for 3 hours and (2x-60) miles per hour for the next 4.75 hours.Express the total distance traveled in terms of x.

Total distance covered by the man in terms of 'x' = (12.5x-285)miles

Step-by-step explanation:

Given:

Speed of a man = 'x' miles/hour

Time taken = $3$ hour

So, distance = product of speed and time.

Distance covered in term of 'x' $=(d_1=3x)$

Now,

Speed = $(2x-60)$ miles/hour

Time taken= $4.75$ hours

Distance $(d_2)$ = $(2x-60)\times 4.75$

= $(2x\times 4.75) -(60\times 4.75)$

= $(9.5x - 285)$ miles

Total distance covered by the man = Summation of $d_1$ and $d_2$

= $(9.5x-285+3x)$

= $(12.5x-285)$ miles

So the total distance covered by the man in terms of 'x' = (12.5x-285) miles.

6 0

4 years ago

I dont know what to do lol

atroni [7]

Answer:

15 units

Step-by-step explanation:

The distance between two points can be found using the following formula:

$d\sf=\sqrt{(x_2-x_1)+(y_2-y_1)}$

Given points:

(-7, 5) and (2, -7)

<u>where:</u>

x₁ = -7
x₂ = 2
y₁ = 5
y₂ = -7

Substitute these points into the formula and simplify:

$\sf d=\sqrt{(2-(-7))^2+((-7)-5)^2} \ \textsf{[simplify the radicand]}\\\\ d=\sqrt{(2+7)^2+(-12)^2} \ \textsf{[simplify]}\\\\d=\sqrt{(9)^2+(-12)^2} \ \textsf{[evaluate the power]}\\\\d=\sqrt{81+144} \ \textsf{[add]}\\\\d=\sqrt{225}\ \textsf{[simplify]}\\\\d=15$