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2 years ago

Which ordered pair is on the graph of the equation 3x + 7y = 11?

Mathematics

1 answer:

andreev551 [17]2 years ago

4 0

Answer: (6, -1)

Step-by-step explanation:

Plug each pair in:

3(6)+7(-1)=11

11=11

True, so the first pair works.

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AFLATI 2 NUMERE STIIND CA AL DOILEA NUMAR ESTE DE 7 ORI MAI MARE DECITPRIMUL IAR SUMA DINTRE DUBLUL PRIMULUI NUMAR SI TRIPLUL CE

postnew [5]

Answer:

The numbers are 20 and 140

Step-by-step explanation:

The question in English is

Find 2 numbers knowing that the second number is 7 times greater than the first, and the sum between the double of the first number and the triple of the second is 460

Define the variables

Let

x ----> the first number

y ----> the second number

we know that

$y=7x$ -----> equation A

$2x+3y=460$ ----> equation B

Solve the system of equations by substitution

Substitute equation A in equation B

$2x+3(7x)=460$

solve for x

$2x+21x=460$

$23x=460$

$x=20$

Find the value of y

$y=7x$ ----> $y=7(20)=140$

The numbers are 20 and 140

6 0

3 years ago

Solve this problem, and identify the percent, amount, and base. What percent of 60 is 15?

ValentinkaMS [17]

First, you must understand the question. what % of 60 is 15, so I would write an equation to express this.

15 = 60x

From there, solve for x, so Divide by 60 on each side. The answer is 1/4, or 25%

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3 years ago

Nick can type 30 words a minute. How many words can be typed in 9.5 minutes?

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Answer:

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Step-by-step explanation:

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2 years ago

Read 2 more answers

Help which graph describes exponential decay

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