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Setler [38]
3 years ago
5

Tommy Took a test which has 20 questions . The total grade was computed by awarding 10 points for each correct answer and deduct

ed five points for each incorrect answer . he answered all my questions and received a score of 125. How many wrong answers did he have ?
​
Mathematics
1 answer:
siniylev [52]3 years ago
3 0
Bf DBD DBD skisbsbbe wisusvvs wjshshs
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Can you help me, please ​
vfiekz [6]

Answer:

hi, have a great day

Step-by-step explanation:

Correct option is

B

f(x)=x

2

+6

f(g(x))=h=4x

2

+4x+7=(2x+1)

2

+6=(g(x))

2

+6

⇒f(x)=x

2

+6

5 0
2 years ago
Read 2 more answers
Mark has, in his kitchen, the ingredients needed to prepare 78 different recipes with two ingredients
pochemuha

Answer:

13 ingredients

Step-by-step explanation:

The number of different recipes that can be made from 2 ingredients = 78

Since there are no two recipes that share the exact same two ingredients ;

The number of recipes in Mark's kitchen is:

nCk = 78

k = Number of ingredients per recipe = 2

n = total number of ingredients in kitchen

Total recipes made = 78

n! / (n-r)!r! = 78

n! / (n - 2)!2! = 78

n(n-1)(n-2)! / (n-2)! * 2 * 1 = 78

n(n - 1) / 2 = 78

n(n-1) = 156

n² - n = 156

n² - n - 156 = 0

Factorize :

n² - 13n + 12n - 156 = 0

n(n - 13) +12(n-13) = 0

(n-13) = 0 ; (n+12) = 0

n = 13 or n = - 12

n cannot be negative

Hence, n = 13

Number of ingredients is 13

3 0
3 years ago
Find the surface area of the figure.
guajiro [1.7K]

<u>Given</u>:

Given that the radius of the cylinder is 6 m.

The height of the cylinder is 7 m.

We need to determine the surface area of the cylinder.

<u>Surface area of the cylinder:</u>

The surface area of the cylinder can be determined using the formula,

SA=2 \pi r(r+h)

where r is the radius and h is the height of the cylinder.

Substituting r = 6 and h = 7 in the above formula, we get;

SA=2 (3.14)(6)(6+7)

Simplifying, we get;

SA=2 (3.14)(6)(13)

Multiplying, we get;

SA=489.84 \ m^2

Thus, the surface area of the cylinder is 489.84 square meters.

Hence, Option a is the correct answer.

4 0
4 years ago
In one year the Makati family drove the car 15,680 miles to the nearest thousand how many miles did they drive their car that ye
ser-zykov [4K]
Answer: 16,000 Miles

How I got that? well I was taught that if the number is 5 or higher you should round it off to the left by 1... I basically just ad a 1 to the 15 because the 6 was higher than 5 so I got 15,680 - 16,000.
8 0
4 years ago
On a balance of $1448.00, calculate this month's finance charge @ 1.75%/month
Alex787 [66]
1.75% of $1448.00 is $25.34. So The monthly financial charge is $25.34.

If this was annually.....the cost would be $304.08 annually :)
3 0
4 years ago
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