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3 years ago

(blank) plus (-7) equals 3

Mathematics

2 answers:

fenix001 [56]3 years ago

7 0

N divided by 3 equals 7
n/3 = 7
n=21

ExtremeBDS [4]3 years ago

3 0

x + -7 = 3

because 7 is negative the problem can be rewritten as

x-7 = 3

add 7 to each side:

x = 7+3 = 10

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A rectangular prism has a height of 15 centimeters and a width of 6 centimeters. The surface area of the prism is 684 square cen

Gala2k [10]

Answer:

Step-by-step explanation:

Let the length be L

Formula

SA = 2Lw + 2Lh + 2wh

Givens

h = 15 cm

w = 6 cm

L = ?

SA = 684 cm^2

Solution

Substitue what you know into the given formula

2*6*L + 2*15*L + 2 * 6 * 15 = 684 Combine

12*L + 30*L + 180 = 684 Combine again

42L + 180 = 684 Subtract 180 from both sides.

42L +180 -180 = 684 - 180

42L = 504 Divide by 42

Answer: L = 12

7 0

2 years ago

Divide a^24-a^18+a^12 by a^6<br> what is the quotation?

lana66690 [7]

I think you mean "what is the QUOTIENT?"

$\dfrac{a^{24} - a^{18} + a^{12}}{a^6} =$

$= \dfrac{a^{24}}{a^6} - \dfrac{a^{18}}{a^6} + \dfrac{a^{12}}{a^6}$

$= a^{24 - 6} - a^{18 - 6} + a^{12 - 6}$

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5 0

4 years ago

If (7^2)^p= 7^6, what is the value of p? 2, 3, 4, 8

N76 [4]

The value of P Is 3!! Your welcome:))

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3 years ago

The figure below is made up of a square with height, h, units and a right triangle with height, h units, and a base length, b un

Elza [17]

Answer:

Step-by-step explanation:

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4 0

3 years ago

A shopkeeper allows 15% discount on the marked price, still he manages to have 7% profit. How much high did he mark his goods ab

lianna [129]

Answer: $25.9\%$

Step-by-step explanation:

Given

Shopkeeper allows 15% discount on the marked price and still manages a profit of 7%

Suppose the marked price is $x$

So, the selling price is $(1-0.15)x=0.85x$

Suppose the cost price is $y$

$\Rightarrow \dfrac{0.85x-y}{y}=7\%\\\\\Rightarrow \dfrac{0.85x}{y}-1=0.07\\\\\Rightarrow \dfrac{0.85x}{y}=1.07\\\\\Rightarrow y=\dfrac{0.85x}{1.07}\\\\\Rightarrow y=0.794x$

So, the percentage the shopkeeper marked his goods above cost price

$\Rightarrow \dfrac{x-y}{y}\times 100\\\\\Rightarrow \dfrac{x-0.794x}{0.794}\times 100\\\\\Rightarrow \dfrac{0.2056}{0.794x}\times 100\\\\\Rightarrow 25.89\%\approx 25.9\%$

6 0

3 years ago