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3 years ago

Hey guys can somebody help me please ? With all the questions

Mathematics

2 answers:

never [62]3 years ago

8 0

The answer to the riddle is I_SO_LATE_ME! (the underscores are the squares.

1. 3x+2=5 (o)

2. 4+9+5+x=2x (square)

3. x/4+7=12 (a)

4. 2x+3=12 (e)

5. 7x=42 (!)

6. x/5=3 (e)

7. 2x+3x+4=12 (s)

8. 3x-2=5 (square)

10.

11.

12.

13.

guajiro [1.7K]3 years ago

3 0

Sorry this is not the answer but I think it will help majorly it you can replace the unknown numbers with random ones and just keep on switching it out. Hope it helps a bit. :)

You might be interested in

There are a total of 180 students and 35 teachers going to Billy Bob's BBQ restaurant for a Math field trip!

olasank [31]

Anwers:

= 36 : 7

STAY SAFE, GOD BLESS YOU :)

Explanation:

180 ÷ 5 : 35 ÷ 5

36 : 7

3 0

3 years ago

The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 460 seconds and a

AlekseyPX

Answer:

The time that the boys need to beat in order to earn a certificate of recognition from the fitness association is 511.264 seconds.

Step-by-step explanation:

We are given that the time for this event for boys in secondary school is known to possess a normal distribution with a mean of 460 seconds and a standard deviation of 40 seconds.

The fitness association wants to recognize the fastest 10% of the boys with certificates of recognition.

Let X = time for this event for boys in secondary school

SO, X ~ Normal( $\mu=460,\sigma^{2} =40^{2}$ )

The z-score probability distribution for normal distribution is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1)

where, $\mu$ = mean time = 460 seconds

$\sigma$ = standard deviation = 40 seconds

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

Now, it is given that the fitness association wants to recognize the fastest 10% of the boys with certificates of recognition, which means;

P(X > x) = 0.10 {where x is the required time which boy need to beat}

P( $\frac{X-\mu}{\sigma}$ > $\frac{x-460}{40}$ ) = 0.10

P(Z > $\frac{x-460}{40}$ ) = 0.10

So, the critical value of x in the z table which represents the top 10% of the area is given as 1.2816, that is;

$\frac{x-460}{40} =1.2816$

${x-460}{} =1.2816\times 40$

$x$ = 460 + 51.264 = 511.264 seconds

Hence, the time that the boys need to beat in order to earn a certificate of recognition from the fitness association is 511.264 seconds.

8 0

3 years ago

You owe $225 on your credit card. You make a $55 payment, but then you make a purchase of $87 worth of clothes. What is the inte

azamat

the answer is $-257

-225+55= -170

-170-87= -257

8 0

3 years ago

Which expressions are equal to 0 when x = -1? Check all that apply.

Sphinxa [80]

Answer:

A C and E

Step-by-step explanation:

6 0

3 years ago

Find the common ratio of the geometric sequence 18,-72,288,...

tamaranim1 [39]

Answer:

The common ratio of the geometric sequence is -4

Step-by-step explanation:

Geometric Sequence

A geometric sequence is defined as a series of numbers that follow a fixed pattern: Each term equals the previous term times a fixed number called the common ratio. The recursive formula is:

$a_n=a_{n-1}*r$

Where r is the common ratio.

We are given three terms of a geometric sequence:

18,-72,288,...

To find the common ratio, just divide each term by the previous term:

$\displaystyle r=\frac{-72}{18}=-4$

Make sure it's a fixed number and test with the third term:

$\displaystyle r=\frac{288}{-72}=-4$

Since both numbers coincide, the common ratio of the geometric sequence is -4

5 0

3 years ago