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Viefleur [7K]
2 years ago
15

Question 7. evaluate the expression

Mathematics
2 answers:
Simora [160]2 years ago
6 0

Answer:

<u>-3</u>

Step-by-step explanation:

<u>Using PEMDAS</u> :

  1. Parentheses
  2. Exponents
  3. Multiplication
  4. Division
  5. Addition
  6. Subtraction

<u>Exponent (in Parentheses)</u>

  • (3³ - 6 × 8) ÷ 7
  • (27 - 6 × 8) ÷ 7

<u>Multiplication (in Parentheses)</u>

  • (27 - 6 × 8) ÷ 7
  • (27 - 48) ÷ 7

<u>Subtraction (In Parentheses)</u>

  • (27 - 48) ÷ 7
  • -21 ÷ 7

<u>Division</u>

  • -21 ÷ 7
  • <u>-3</u>
AlladinOne [14]2 years ago
4 0

\left(3^3 - 6 \cdot 8 \right) \div 7\\\\\\= \dfrac{27-48}{7}\\\\\\=-\dfrac{21}7\\\\\\=-3\\

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Find the slope and y-intercept of the line through the points (-3,-4) and (0,-1)​
Alja [10]

Answer:

Slope=1, y-intercept=-1.

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(-1-(-4))/(0-(-3))

m=(-1+4)/(0+3)

m=3/3

m=1

y-(-4)=1(x-(-3))

y+4=x+3

y=x+3-4

y=x-1

y=mx+b where m=slope and b=y-intercept

so you have slope of 1 and y-intercept of -1

6 0
3 years ago
En un salon de clases cuando se colocan cuatro alumnos en cada banca, 3 de ellos quedan sin puesto y cuando se colocan de a 5 en
Harlamova29_29 [7]

Answer: 5 benches and 23 students

Step-by-step explanation:

I will answer in English.

We have E students and B benches.

If we sit 4 students per bench, we have 3 students left.

then:

E = 4*B + 3

And if we sit 5 students per bench, there are two places with no students sited.

E = 5*B - 2

now we can replace the E in the second equation with the right part in the first equation:

4*B + 3 = 5*B - 2

3 + 2  = 5*B - 4*B

5 = B

So we have 5 benches, and:

E = 4*5 + 3 = 23 students.

5 0
3 years ago
PLEASE HELP!!!!
frozen [14]
A) \frac{2 \frac{1}{4}}{ \frac{1}{2}}
b)\frac{1}{2} • 2 = 1
so \frac{9}{4} • 2 = \frac{9}{2} cups (which is 4 \frac{1}{2} )
5 0
3 years ago
You use 4 gallons of water on 14 plants in your garden.
GrogVix [38]

Answer:

35 plants

Step-by-step explanation:

For this case we can make the following rule of three:

4 gallons --------------> 14 plants

x --------------------------> 35 plants

From here, we clear the value of x.

We have then:

therefore, 10 gallons are needed to irrigate 35 plants.

Answer:

it will take 10 gallons to water 35 plants

4 0
3 years ago
Read 2 more answers
What is the value of the expression 9+n/3-6 when n is 12?
Nina [5.8K]
-7 (9+12/3-6)=21/-3=-7
4 0
3 years ago
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