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stepladder [879]
3 years ago
13

Evaluate 30 - 12 / 3 * 2

Mathematics
1 answer:
Ivenika [448]3 years ago
3 0
Answer:22

step by step:
so we have PE(MD)(AS)
(for multiplication and division it depends on left to right, same for addition and subtraction)

this could be read as
30 - [(12/3)*2]

first you would do 12/3 which is 4
then you do 4*2 which is 8
last you do 30-8 which is 22

hope that helps :)
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Question 7 of 10
Mama L [17]

Answer:

B

Step-by-step explanation:

Given a quadratic equation in standard form

ax² + bx + c = 0 ( a ≠ 0 )

Then the discriminant is

Δ = b² - 4ac

• If b² - 4ac > 0 then 2 real irrational roots

• If b² - 4ac > 0 and a perfect square then 2 real rational roots

• If b² - 4ac = 0 then 1 real double root

• If b² - 4ac < 0 then 2 complex roots

Given

x² + 3x - 7 = 0 ← in standard form

with a = 1, b = 3, c = - 7 , then

b² - 4ac

= 3² - (4 × 1 × - 7) = 9 + 28 = 37

Since b² - 4ac > 0 then 2 real irrational roots

8 0
3 years ago
What are all the exact solutions of -3tan^2(x)+1=0? Give your answer in radians.
goldenfox [79]
   
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4 0
3 years ago
Read 2 more answers
Evaluate 0.53n + 5 when n= 3 and when n= -3
Dahasolnce [82]

Answer:

1.59&-1.59

Step-by-step explanation:

.53(3)+5=1.59

7 0
3 years ago
The sum of three different positive integers is 7. What is the product of these three<br>integers?​
ioda

Answer:

2+1+4=7

Step-by-step explanation:

Just break apart your number.

since we are using (7), I just took a bit away from it.

so, 7-2=5

then, i broke apart 5 into 2 pieces.

5-4=1

so, 4, 1, and 2 work for this problem  

8 0
3 years ago
1- the diameter of a CD is 24 cm nearest to cm .find its upper and lower bound.
Tanya [424]

Answer:

1) Lower bound = 23.5 cm

Upper bound = 24.5 cm

2) I disagree

3) 7.88

4) 2.32

5) Ahmed = 60 kg

Jasim = 20 kg

Dalal = 100 kg

Step-by-step explanation:

1) diameter = 24 cm was rounded up to the nearest cm.

Now, usually, we round up 0.5 to the next whole number. This means that, the actual diameter is;

23.5 ≤ D < 24.5

Thus;

Lower bound = 23.5 cm

Upper bound = 24.5 cm

2) If you weigh 57g,converting to kg is 0.57 kg.

Now, this does not fall in between 56.5kg and 57.5kg given.

Thus, I disagree that your weight could be anything between 56.5kg and 57.5kg .

3) 7.875 approximated to the nearest two decimal place = 7.88

4) 2.3242900000 to the nearest 2 decimal place = 2.32

5) 180 kd shared between ahmed ,jasim and Dalal in the ratio of 3:1:5.

Total part of ratio = 3 + 1 + 5 = 9

Their respective shares are;

Ahmed = 3/9 × 180 = 60 kg

Jasim = 1/9 × 180 = 20 kg

Dalal = 5/9 × 180 = 100 kg

4 0
2 years ago
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