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3 years ago

2 is subtracted from a number,and rhen the difference is multiplying by 5. the result is 30.find the number

Mathematics

1 answer:

UkoKoshka [18]3 years ago

5 0

Answer:

Step-by-step explanation:

x-2= x x×5=30 (make x the subject).So x=30÷5=6
x-2=6
x=6+2
x=8

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Solve z ÷ (–7) = –1. A. 7 B. -7 C. 1/7 D. 6

aalyn [17]

Answer:

A. 7

Step-by-step explanation:

z ÷ (–7) = –1.

multiply each side by -7

z ÷ (–7)*-7 = –1.*-7

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3 years ago

Read 2 more answers

Find f(-5) if f(n) = n^3 + 3n^2

Andrew [12]

Plug in -5 for n
-5^3 + 3(-5)^2
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3 years ago

A biking track has a length of 3168 feet (ft). How long is this in miles (mi)?

Liono4ka [1.6K]

Answer:

0.6 miles

Step-by-step explanation:

Given that,

A biking track has a length of 3168 feet (ft).

We need to find the distance in miles.

We know that, 1 mile = 5280 foot

1 feet = (1/5280) mile

Now, we can find the distance in miles by multiplying 3168 by (1/5280).

$d=3168 \times \dfrac{1}{5280}\\\\=0.6\ \text{miles}$

So, the distance covered is 0.6 miles.

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3 years ago

What's the average rate of the graph from x = -2 to x = 0?

inn [45]

Answer:

-2

Step-by-step explanation:

I hope this helps you :)

-KeairaDickson

7 0

3 years ago

(didnt mean to select an answer) can someone help me with this, and if possible please explain it I don't know how to do direct

LiRa [457]

9514 1404 393

Answer:

(b) y = -5x

Step-by-step explanation:

When "y varies directly as x" the equation for that is ...

y = kx . . . . . . . for some constant k

The value of k can be found by solving for it:

k = y/x . . . . . . divide by x

So, the given point (x, y) = (2, -10) tells you the value of k is ...

k = -10/2 = -5

and the direct variation equation is ...

y = -5x

_____

Additional comments

There are a couple of other useful facts about direct variation. When you compare the equation to the slope-intercept form equation for a line, ...

y = mx + b

you see that b=0 and the slope, or rate of change, (m) is the same as k.

The y-intercept of 0 means that the graph of any direct-variation equation must go through the origin. (If it does not, then the variation is not direct.)

4 0

3 years ago