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3 years ago

What was the original number if after 40% it became 420

Mathematics

2 answers:

Liula [17]3 years ago

8 0

Answer:

588 should be the answer :)

Jobisdone [24]3 years ago

5 0

Answer:

300

Step-by-step explanation:

Solve for x.

x+(2/5*x)=420

x=300

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A toy airplane climbs 30 vertical feet while traveling 50 feet horizontally. A toy helicopter climbs 20 feet while traveling 40

PilotLPTM [1.2K]

Answer:

Slope is the change in y over the change in x. The toy airplane would then have a slope of 3/5 and the toy helicopter would have a slope of 1/2. As 3/5 is greater than 1/2, the toy airplane would have a greater slope.

Hope this helps!

Step-by-step explanation:

Mark me as brainliest pls :)

8 0

3 years ago

Read 2 more answers

Melissa wants to cover a square table with tiles. if she uses exactly 100 tiles, which could be the length of one side?

Eduardwww [97]

Answer:

The length of one side is 25 tiles

Step-by-step explanation:

Given

$Tiles = 100$

Required

Determine the length of one side

The given parameter represents the perimeter of the table

Since the table is a square, then

$Perimeter = 4L$

Substitute 100 for Perimeter

$100 = 4L$

Solve for L

$L= 100/4$

$L = 25$

Hence:

<em>The length of one side is 25 tiles</em>

3 0

3 years ago

Which function is graphed?

gavmur [86]

Answer B

the first curve stops on (1 ; 3) excluded (x < 1)

and

the straight line starts on (1 ; 1) included (x ≥ 1)

3 0

2 years ago

P (n), given below, is the price P in dollars for n grams of vitamins.P(n)=0.4n+5.7Complete the following statements.

Amanda [17]

(a)

In the function P(n) = 0.4n +5.7, P(n) is price of n grams of vitamins. So for the function x = P(n); x is price of n grams of vitamins.

The inverse of function determine amount of the vitamins for the known price of x dollars. So answer is,

The amount of vitamins (in grams) for a price of x dollars.

(b)

Let P(n) = x, So

$x=0.4n+5.7$

Replace n by x and x by n in the given equation.

$n=0.4x+5.7$

Simplify the equation for x.

$\begin{gathered} n+0.4x+5.7 \\ n-5.7=0.4x \\ x=\frac{n-5.7}{0.4} \\ =\frac{10n-57}{4} \end{gathered}$

So inverse of function is after interchange of variables,

$P^{-1}(x)=\frac{10x-57}{4}$

(c)

Substitute 8.3 for x in the inverse equation to obtain the valur of P^-1(8.3).

$\begin{gathered} P^{-1}(8.3)=\frac{10\cdot8.3-57}{4} \\ =\frac{83-57}{4} \\ =\frac{26}{4} \\ =6.5 \end{gathered}$

So answer is 6.5.

7 0

1 year ago

Wrie down the equation of the line that is parallel to 4x - 2y = 7 and passes through (9, -3)

EastWind [94]

Answer:

4x-2y =42 is the required equation

Step-by-step explanation:

given equation is,

4x-2y -7=0---------eqn1

parallel equation of given equation is

4x -2y+k =0-------eqn 2

now passing it through (9,-3), we get,

4×9 + 2×3 +k = 0

or,36+6+k =0

or,42+k =0

or, k= -42

putting the value of k in eqn2

4x-2y - 42=0

4x-2y = 42

4 0

3 years ago