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Cerrena [4.2K]
3 years ago
6

Write an expression involving integers for each statement a) moving 4 steps left, then moving 9 steps right b) on 3 separate occ

asions, Shari lost 2 pencils can someone answer me in separate parts A and part B
Mathematics
1 answer:
Nostrana [21]3 years ago
3 0

Answer:

(a)-4+9

(b)-2 \times 3

Step-by-step explanation:

<u>Part A</u>

Moving 4 steps left, then moving 9 steps right

When you move left, we indicate with a negative sign while a move right is indicated with a positive sign.

Moving 4 steps left = -4

Moving 9 steps right = +9

Therefore, an expression for the statement is:-4+9

<u>Part B</u>

When you lose or owe in word problems, it is usually indicated using a negative sign.

Therefore, the statement Shari lost 2 pencils can be represented with the integer: -2

Since Shari lost 2 pencils on 3 occasions, we simply have:

-2 \times 3

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Ben sells homemade cards at a craft fair. He wants to earn more than $50 at the fair. He sells his cards for $2 and he has alrea
Kryger [21]

Answer:

He must sell 8 cards to reach the minimum goal.

Step-by-step explanation:

Giving the following information:

He wants to earn more than $50 at the fair.

He sells his cards for $2 and he has already earned $36.

<u>First, we need to calculate the money required to reach the minimum goal:</u>

51 - 36= $15

<u>Now, we write the inequality:</u>

2*x >15

x= number of cards sold.

x>15/2

x> 7.5

He must sell 8 cards to reach the minimum goal.

7 0
3 years ago
Please help me i need this to pass
djyliett [7]

x = 7 and x = –7.

Solution:

Given data:

$f(x)=x^{2}+15 and f(x)=64

To find the solutions when f(x) = 64.

Both are equations of f(x), so equate the given equations, we get

x^2+15=64

To isolate the constant term subtract 15 from both sides.

x^2+15-15=64-15

x^2=49

49 can be written as 7².

x^2=7^2

Taking square root on both sides of the equation, we get

x = ±7

The solutions to f(x) = 64 is x = 7 and x = –7.

4 0
3 years ago
Someone Please Help, What Is P^m Divided By P^n
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The asnwer should be P^m-n
8 0
3 years ago
The manager of a major retail store has taken a random sample of 25 customers. The average sale was $52.50. The population stand
zimovet [89]

Answer

The answer and procedures of the exercise are attached in the following archives.

Step-by-step explanation:

You will find the procedures, formulas or necessary explanations in the archive attached below. If you have any question ask and I will aclare your doubts kindly.  

5 0
4 years ago
A new surgery is successful 70% of the time , if the results of 8 such surgeries are randomly sampled, what is the probability t
il63 [147K]

Answer:

P (x>5) = 0.5324014=0.523

Step-by-step explanation:

Here success = p= 0.7 and failure = q= 1-p= 1-0.7 = 0.3

Number of surgeries= n= 8

Applying the binomial distribution

( p+q) ^n= nC x p^x . q^n-x

More than 5 means  6,7, and 8

( p+q) ^8= 8C 5 (0.7)^5 . (0.3)^3

                =56* 0.16807*0.027

                       = 0.254121

( p+q) ^8= 8C 6 (0.7)^6 . (0.3)^2

                =  28* 0.1177* 0.09

                    = 0.296604

( p+q) ^8= 8C 7 (0.7)^7 . (0.3)^1

                =  8* 0.0824* 0.3

                  = 0.19776

( p+q) ^8= 8C8 (0.7)^8 . (0.3)^0

                =  1* 0.05765* 1

                  =0.05765

Adding the above all probabilities  gives

P (x>5) = P (x=6) + P(x=7) + P(x=8)

               = 0.296604+0.19776+0.05765

                   = 0.5324014

7 0
3 years ago
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