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Tresset [83]
3 years ago
9

Bradley answered 80% of the questions on his science test correctly. There were 30 questions on the test, and all the questions

had equal value. How many questions did Bradley answer correctly on his test?
Mathematics
2 answers:
son4ous [18]3 years ago
8 0

Answer:

24 correct questions

Step-by-step explanation:

weqwewe [10]3 years ago
6 0
Multiply 30 by 80% - or 0.8.
The resulting number is how many questions he got right.
Subtract that number from the total of 30, and you'll know how many he got wrong.
You can also do it as a fraction - 80% out of 100% is 80/100, or 4/5. So he got 4/5 right and 1/5 wrong.
30 multiplied by 1/5 is the same as 30 divided by 5. So 30 divided by 5 will be how many questions he got wrong.
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When solving negative one over three (x − 15) = −4, what is the correct sequence of operations?
iogann1982 [59]
-1/3(x - 15) = -4

step 1 : multiply both sides by -3, step 2 : add 15 to both sides

because when u multiply both sides by -3, this cancels out the -1/3 on the left side leaving u with : x - 15 = -4 * -3.....x - 15 = 12.....and then u would add 15 to both sides....giving u : x = 12 + 15.....x = 27
7 0
3 years ago
Twice a number added to half of itself equals 24. Find the number.
Nady [450]

Answer:

12+12

Step-by-step explanation:

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7 0
3 years ago
The circumference of a circular field is 285.74 yards. What is the diameter of the field? Use 3.14 for it and do not round your
trapecia [35]

Answer:

The diameter is 91.

Step-by-step explanation:

The formula for circumference is 2*pi*radius(you can use circumference = diameter*pi too). Plug 285.74 into it. Divide both sides by 3.14, and you get 2*radius(aka the diameter) = 91

8 0
3 years ago
Read 2 more answers
How do you solve (Arc)QPT if <QZT = 120
yuradex [85]
By definition, the arc length is given by:
 arc = R * theta * ((2 * pi) / 360)
 Where,
 theta: angle in degrees
 R: radio
 We have then:
 (Arc) QPT if <QZT = 120:
 theta = 360-120 = 240 degrees
 R = 13.5 units
 Substituting values we have:
 (Arc) QPT = R * theta * ((2 * pi) / 360)
 (Arc) QPT = (13.5) * (240) * ((2 * pi) / 360)
 (Arc) QPT = 56.55 units
 Answer:
 
(Arc) QPT = 56.55 units
7 0
3 years ago
PLEASE HELP ME BAD AT GEOMETRY PLEASE THANKS A WHOLE BUNCH
Setler [38]
V = π r² h

V = π (4)² 8
 
V = 402.12

Hope this helps :)
5 0
3 years ago
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