3 years ago

- 3x + 2y = 56 – 5x – 2y = 24 y= x=

Mathematics

1 answer:

Dafna1 [17]3 years ago

4 0

Answer:

x= -10 Cannot find Y

Step-by-step explanation:

Well -10 I got online and I couldnt do for Y see ya

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If 64 is added to a number, the result is 40 less than three times the number. Find the number.

damaskus [11]

Answer:

Step-by-step explanation:

Let the required number be x.

According to the given description:

x + 64 = 3x - 40

64 + 40 = 3x - x

104 = 2x

x = 104/2

x = 52

Thus, the required number is 52.

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3 years ago

Which situation can be represented by the equation -20 x 4 = -80

Nadya [2.5K]

You owed someone 20 dollars at 4 different times, you owe them 80 dollars in total

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3 years ago

What is the difference of -25 and -125?

jek_recluse [69]

Answer:

100

Step-by-step explanation:

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3 years ago

What is the exact circumference of a circle with a diameter of 40 feet?

Irina-Kira [14]

Answer:

The answer is

Step-by-step explanation:

Circumference of a circle is πd

Where d is the diameter

From the question

d = 40 feet

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40π

= 125.66

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Hope this helps you

7 0

4 years ago

Keith is a drummer who purchases his drumsticks online. When practicing with the newest pair, he notices they feel heavier than

Marina86 [1]

Answer: 0.0174

Step-by-step explanation:

Given : $\mu=1.85\ \ ; \sigma=0.18$

Let x be the random variable that represents the weight of the drumsticks.

We assume that the weight of the drumsticks is normally distributed.

Now, the z-score for x=2.23 , $\because z=\dfrac{x-\mu}{\sigma}$

$\Rightarrow\ z=\dfrac{2.23-1.85}{0.18}\approx2.11\ \ \$

Using z-value table , we have

P-value =P(x≥2.23)=P(z≥2.11)=1-P(z<2.11)=1-0.9825708

=0.0174292≈0.0174 [Rounded nearest 4 decimal places]

Hence, the probability of the stick's weight being 2.23 oz or greater = 0.0174

6 0

4 years ago