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Mumz [18]
3 years ago
7

Solve the equation 7/z-1 = 9/z+4

Mathematics
1 answer:
algol [13]3 years ago
3 0

Answer:

z is equal to 18.5

Step-by-step explanation:

When an equation is in the format a/b = c/d, the quickest way to simplify it is to cross multiply.  Each side is multiplied by the other sides denominator, eliminating the division:

\frac{7}{z-1} = \frac{9}{z + 4}\\7(z + 4) = 9(z - 1)\\7z + 28 = 9z - 9\\7z - 9z = -9 - 28\\-2z = -37\\z = 37/2\\z = 18.5

So z is equal to 18.5

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What is the solution to the equation P over 9= 72?
Fed [463]
P / 9 = 72

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P / 9 (9) = 72 (9)

p = 648

4 0
3 years ago
Can someone explain to me taxes?
jeka94

taxes
According to the oxford dictionary, the word taxes defines as a compulsory contribution to state revenue, levied by the government on workers' income and business profits, or added to the cost of some goods, services, and transactions.

explanation
Money is taken from your yearly earnings to pay for services such as the Police, Emergancy Services, Military, Schools, Postal Service ect. It is also used to pay workers who work in a federal agency such as Postal Workers and the FBI. Citizens of the United States are taxed on items that are non-edible, such as a TV, and phones in stores. Tax percentages differ in every state.

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5 0
3 years ago
Collected 20 cans this week, 25 cans next week what is the percent of increase
BartSMP [9]
Hello!!

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Good luck :)
5 0
3 years ago
A pizzeria charged 12 per pizza plus an addition $3.00 for delivery which equation represents the cost of having any number of p
Liula [17]
Y=12x+3

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3 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20-%208y%20%5Cgeqslant%2056" id="TexFormula1" title=" - 8y \geqslant 56" alt=" - 8y \geqslant
SCORPION-xisa [38]

Answer:

y ≤-7

Step-by-step explanation:

-8y ≥56

Divide each side by -8.  Remember to flip the inequality

-8y/-8 ≤56/-8

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8 0
3 years ago
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