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3 years ago

Solve 3x2 + 4x = −5.

Mathematics

2 answers:

erastova [34]3 years ago

3 0

Answer:

Step-by-step exExplanation:

Solve:

−

is a quadratic equation in standard form:

where:

−

Quadratic formula

−

√

−

Plug in the known values.

−

(

−

)

√

(

−

)

−

⋅

−

⋅

Simplify.

√

Prime factorize

√

Apply rule:

√

Simplify.

√

Solutions for

√

−

√

Related questions

How do you know how many solutions

−

has?

What is the Quadratic Formula?

planation:

baherus [9]3 years ago

3 0

Answer:

x= -11/4

Step-by-step explanation:

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Amar keeps picking playing cards out of a standard deck of 52 cards in the hopes that he will

lapo4ka [179]

Answer:

The required probability is, 0.78

Step-by-step explanation:

There are, (52 - 13) = 39 cards which are not spade

5 cards can be chosen from the deck of 52 cards in

$^{52}{C}_{5}$ ways

and out of these 5 choices, none of them will be spade in,

$^{39}{C}_{5}$ ways

So,

P(None of the chosen cards is spade)

= $\frac {^{39}{C}_{5}}{^{52}{C}_{5}}$

$\simeq 0.22$

Hence,

P(out of these 5 choices, at least one card is spade)

$\simeq (1 - 0.22)$

= 0.78

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3 years ago

3 pizzas for $ 16.50 what is the unit rate for one pizza

o-na [289]

The answer is 5.50$ you have to divide 16.50/ 3

8 0

3 years ago

Read 2 more answers

The squares of the first five whole numbers

antiseptic1488 [7]

Answer:

Square each number: 1 , 2 , 3 , 4 , 5:

1² = 1 * 1 = 1

2² = 2 * 2 = 4

3² = 3 * 3 = 9

4² = 4 * 4 = 16

5² = 5 * 5 = 25

4 0

3 years ago

Solve for x and y in the system of equation<br>3x²+4y=17 <br>2x²+5y=2<br>I'll mark brainliest

Novay_Z [31]

Answer:

$x=\pm \sqrt{11} \\y=-4.$

Step-by-step explanation:

$\left \{ {{3x^2+4y=17} \atop {2x^2+5y=2}} \right. \\\\Then\\\\\left \{ {{2 \times (3x^2+4y)=2 \times 17} \atop {3\times(2x^2+5y)=3\times2}} \right. \\\\\left \{ {{6x^2+8y=34 \quad (1)} \atop {6x^2+15y=6\quad (2)}} \right.\\\\(1)-(2) \Rightarrow -7y=28 \Rightarrow y =-4.\\Since \: \: 2x^2+5y=2 \Rightarrow 2x^2=2-5y\\\Rightarrow 2x^2=2+20=22\\\Rightarrow x^2=22:2=11\\\Rightarrow x=\pm \sqrt{11}.$

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2 years ago

#38: The integers below represent the monthly gains and losses in the value of an investment over one year. Find the mean of the

jek_recluse [69]

It should be $84.50 because you have to add all the numbers up and divide it by how many numbers there are

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3 years ago