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3 years ago

Suppose Joe earned three times as much as Marty during the summer.Together they earned 210.How much did each earn?

Mathematics

1 answer:

JulijaS [17]3 years ago

7 0

Answer:

Marty got 70 and then Joe earned 3 times it

Step-by-step explanation:

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State the number of real zeros and what they are for "3x^2+5x-2" pleas help me:'(

Lady bird [3.3K]

This can be solved by factoring.

First, set the expression equal to zero.

$3x^2+5x-2=0$

Then, find two the factors of $ac$ whose sum is $b$ .

$6, -1$

Split $b$ into these two factors.

$3x^2+6x-x-2=0$

Next, factor by grouping.

$3x(x+2)-1(x+2) = (3x-1)(x+2) = 0$

By the Zero Product Property, set each factor equal to zero.

$3x-1 = 0 \\ x = 1/3$

$x+2=0 \\ x = -2$

These are the solutions. The Complex Conjugate Root Theorem and the Fundamental Theorem of Algebra both state that, in essence, real and imaginary solutions come in pairs of two and every polynomial of degree $n$ has exactly $n$ complex roots, but real roots are also complex roots. That sounds confusing, but this just means that you're done. Your answers are -2 and 1/3. There are two real roots.

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3 years ago

A printer takes 30 minutes to print a banner and a poster. I will take 50 minutes to print a banner and three posters. How long

qwelly [4]

Answer:

It takes the printer 20 minutes to print a banner

Step-by-step explanation:

Notice that there are two unknowns in this problem: the time to print a poster and the time to print a banner. Let's assign the letter "b" to the time it takes to print a banner, and "p' the time it takes to print a poster.

So we can write the following two equations involving the total amount of time that takes to print in the two cases:

$b+p=30\\b+3p=50$

We can solve for the unknown "p" by subtracting term by term in the equation set above:

$b+3p=50\\b+p=30\\\\b-b+3p-p=50-30\\2p=20\\p=10$

So it takes 10 minutes to print each poster, we can find the time it takes to print the banner by using the value we just found in one of the equations:

$b+p=30\\b+10=30\\b=20$

So, it takes 20 minutes to print a banner.

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3 years ago

Helppp What’s 35 X 49 ??

Ronch [10]

Answer:

Answer is 1715

Step-by-step explanation:

DON'T make fun in brainly. 

this app is made to help more students in all subjects. whatever don't do the mistakes again. 

HAVE A NICE DAY!

THANKS FOR GIVING ME THE OPPORTUNITY TO ANSWER YOUR QUESTION. 

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3 years ago

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If Cody is draining his hot tub which holds 1,400 gallons of water at a rate of 27 gallons a minute, what impact will it have on

inessss [21]

Facts:

- tub has 1400 gallons

- draining at 27 gallons/minute

How much water will be left after 18 minutes?

We know that after 1 minute, there will be 27 gallons less.

So after 18 minutes, there must be 18 times less water.

27 x 18 = 486

This is how much water was lost in 18 min

So to find out how much he had left after 486 is subtracted.

Therefore, the answer is A) -486 gallons

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3 years ago

Why do purely competitive markets tend to benefit consumers over producers? Companies control quality and supply. Companies work

Tom [10]

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3 years ago

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