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2 years ago

Using the rules of Order of Operations, determine which operation would come first in the following

Mathematics

1 answer:

Oduvanchick [21]2 years ago

7 0

Answer:

Add 6 to both sides

Step-by-step explanation:

order of operations acronym- PEMDAS

P= parenthesis

E= exponents

M=multiply

D= Divide

A= Add

S= subtract

No parenthesis, exponents, multiply, or divide, so skip straight to add or subtract

Add comes first so add 6 to both sides

Add 6 to both sides.

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What is the answer? x+y=15 -2x+5y=-2

zavuch27 [327]

Multiply the first equation by 2

2x + 2y =30

now we’ll add the second equation to the first equation

2x + 2y =30
-2x+5y= -2

7y=28

divide by 7

y=4

now plug y back into the first equation

x + 4 = 15

subtract 4

x=11

6 0

3 years ago

Solve: n = 8 4 O n = 2 0 n = 12 Ô n = 24 0 n = 32

zzz [600]

Answer:

1/4 n = 8

n = 8 * 4

n = 32

so option 4 i.e.

n = 32. is the ans

7 0

2 years ago

Read 2 more answers

The cruising speed of a certain airplane is approximately Mach 0.68, meaning 0.68 times the speed of sound. If the speed of

Nonamiya [84]

Tryna get to 100% sorry

5 0

3 years ago

Evaluate 2/3x + 1/2 for x=3/4 (I just copied the exact question)

Travka [436]

Answer:

Step-by-step explanation:

(⅔)(¾) + ½

½ + ½

= 1

6 0

3 years ago

In a recent year, a sample of grade 8 Washington State public school students taking a mathematics assessment test had a mean sc

Daniel [21]

Answer:

The number is $N =1147$ students

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 281$

The standard deviation is $\sigma = 34.4$

The sample size is n = 2000

percentage of the would you expect to have a score between 250 and 305 is mathematically represented as

$P(250 < X < 305 ) = P(\frac{ 250 - 281}{34.4 } < \frac{X - \mu }{\sigma } < \frac{ 305 - 281}{34.4 } )$

Generally

$\frac{X - \mu }{\sigma } = Z (Standardized \ value \ of \ X )$

$P(250 < X < 305 ) = P(-0.9012< Z$

$P(250 < X < 305 ) = P(z_2 < 0.698 ) - P(z_1 < -0.9012)$

From the z table the value of $P( z_2 < 0.698) = 0.75741$

and $P(z_1 < -0.9012) = 0.18374$

$P(250 < X < 305 ) = 0.75741 - 0.18374$

$P(250 < X < 305 ) = 0.57$

The percentage is $P(250 < X < 305 ) = 57\%$

The number of students that will get this score is

$N = 2000 * 0.57$

$N =1147$

6 0

3 years ago