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3 years ago

X^2+21x+20 I need help

Mathematics

2 answers:

julsineya [31]3 years ago

6 0

Sum product - x^2+20+x+20
factor - x(x+20)+x+20
rewrite factor (x+1)(x+20)
bottom one is your answer too is solution

Ratling [72]3 years ago

5 0

Answer: (x+20) (x+1)

Step-by-step explanation:

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How do you solve 8x-3y=-70 and -2x+5y=-8 using the elimination method please show work.

lora16 [44]

Answer:

6x+2y=-78

Step-by-step explanation:

8x-3y=-70

-2x+5y=-8

6x+2y=-78

3 0

3 years ago

Read 2 more answers

Delta makes 12-volt car batteries. These batteries are known to be normally

blondinia [14]

Answer:

The probability that Delta car batteries last between three and four years

P(36≤X≤48) = 0.5188

The percentage of that Delta car batteries last between three and four years

P(3≤X≤4) = 52%

Step-by-step explanation:

Step(i):-

Given that the sample size n =12 -volt car batteries

Let 'X' be a Random variable in a normal distribution

Given that mean of the normal distribution = 45 months

Given that the Standard deviation of the normal distribution = 8months

Step(ii):-

Let X₁ = 3 years = 12 × 3 = 36 months

$Z_{1} = \frac{x_{1} -mean}{S.D} = \frac{36-45}{8} = -1.125$

Let X₂ = 4 years = 12 × 4 = 48 months

$Z_{2} = \frac{x_{2} -mean}{S.D} = \frac{48-45}{8} = 0.375$

Step(iii):-

The probability that Delta car batteries last between three and four years

P(36≤X≤48) = P(-1.125≤Z≤0.375)

= P(Z≤0.375) - P(Z≤-1.125)

= 0.5 +A(0.375) - (0.5-A(1.125)

= 0.5 + 0.1480 - (0.5 -0.3708)

= 0.1480 + 0.3708

= 0.5188

Final answer:-

The probability that Delta car batteries last between three and four years

P(36≤X≤48) = 0.5188

The percentage of that Delta car batteries last between three and four years

P(3≤X≤4) = 52%

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3 years ago

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Dmitriy789 [7]

Answer:

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Step-by-step explanation:

You will take the numbers (however many) multiply them and then use the two signs (greater than less than) to figure which it is. For additional help ask your teacher :)

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4 years ago

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Monica and Ruben hung out at the mall on Saturday. They spent 1 hour shopping for clothes and 1 hour at the food court. Then the

oksian1 [2.3K]

Thats two hours and thirty minutes. startinging at 9:45a.m they would be home by 12:15p.m

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3 years ago

1.6.AP-9

Lyrx [107]

Answer:

a. i. x ≤ 25 ii. 16 < x < 35 iii. 25 < x ≤ 95

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Step-by-step explanation:

a. Model those ranges with compound inequalities

Let x represent the car seat.

i. A car seat designed for a child weighing up to and including 25 lb is described by the inequality.

x ≤ 25

ii. A car seat designed for a child weighing between 16 lb and 35 lb is described by the inequality.

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iii. A car seat designed for a child weighing between 25 lb and 95 lb inclusive is described by the inequality.

25 < x ≤ 95

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Since 35 lb is included in the range of the inequalities for the second and third card seats, the second and third car seats are appropriate for a 35 lb child.

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4 years ago