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3 years ago

8 + 3 • 5 - 20 ÷ 4 = ? Please use the order of operations

Mathematics

2 answers:

nalin [4]3 years ago

8 0

We must multiply and divide before adding and subtracting here. Working from left to right, we get:

8 + 15 - 5 = ?

8 + 10 = ?

18 (answer)

expeople1 [14]3 years ago

5 0

You have to use PEMDAS

$Parentheses \\ Exponents \\ Multiplication \\ Division \\ Addition \\ Subtraction$

You have to do the division and multiplication first.

$3 \times 5 = 15 \\ 20 \div 4 = 5$

The new equation is:

$8+15-5$

First do the addition in the beginning:

$15 + 8 = 23$

At last, subtract 5

$23 - 5 = 18$

Your answer is 18

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2x + 2y = 6<br> 3x − 2y = 29

Mazyrski [523]

Answer:

x = 7

y = -4

Step-by-step explanation:

5x = 35

x=7

14 + 2y = 6

2y = -8

y = -4

7 0

3 years ago

According to records in a large hospital, the birth weights of newborns have a symmetric and bell-shaped relative frequency dist

Kamila [148]

Answer:

15.9% of babies are born with birth weight under 6.3 pounds.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 6.8 pounds

Standard Deviation, σ = 0.5

We are given that the distribution of birth weights is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(birth weight under 6.3 pounds)

P(x < 6.3)

$P( x < 6.3) = P( z < \displaystyle\frac{6.3 - 6.8}{0.5}) = P(z < -1)$

Calculation the value from standard normal z table, we have,

$P(x < -1) = 0.159 = 15.9\%$

15.9% of babies are born with birth weight under 6.3 pounds.

8 0

3 years ago

(1 pt) Which answer is the same as moving the decimal in 6.73 three places to the left? A. dividing 6.73 by 103 B. dividing 6.73

zalisa [80]

D. because when you multiply you move your numbers to the left and 1000 has 3 zeros meaning you will move your answer 3 times to the left .

hope you understand
good luck with your homework

4 0

3 years ago

Read 2 more answers

Solve for f in the proportion.<br> 28/44 = F/99 F = ?

victus00 [196]

Answer:

F = 63

Step-by-step explanation:

28/44 = F/99

28/44 x 99 = F

F = 63

5 0

3 years ago

A uniform bar of length l and weight w is attached to a wall with a hinge that exerts a horizontal force hx and a vertical force

maria [59]

The answer is Hx = ½ Wsin θ cos θ
The explanation for this is:
Analyzing the torques on the bar, with the hinge at the axis of rotation, the formula would be: ∑T = LT – (L/2 sin θ) W = 0
So, T = 1/2 W sin θ. Analyzing the force on the bar, we have: ∑fx = Hx – T cos θ = 0Then put T into the equation, we get:∑T = LT – (L/2 sin θ) W = 0

4 0

3 years ago