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Nimfa-mama [501]
2 years ago
9

A science test, which is worth 100 points, consists of 24 questions. Each question is worth either 3 points or 5 points. If x is

the number of 3-point questions and y is the number of 5-point questions, the system shown represents this situation.
x + y = 24
3x + 5y = 100
What does the solution of this system indicate about the questions on the test?
The test contains 4 three-point questions and 20 five-point questions.
The test contains 10 three-point questions and 14 five-point questions.
The test contains 14 three-point questions and 10 five-point questions.
The test contains 20 three-point questions and 8 five-point questions.A science test, which is worth 100 points, consists of 24 questions. Each question is worth either 3 points or 5 points. If x is the number of 3-point questions and y is the number of 5-point questions, the system shown represents this situation.
x + y = 24
3x + 5y = 100
What does the solution of this system indicate about the questions on the test?
The test contains 4 three-point questions and 20 five-point questions.
The test contains 10 three-point questions and 14 five-point questions.
The test contains 14 three-point questions and 10 five-point questions.
The test contains 20 three-point questions and 8 five-point questions.
Mathematics
2 answers:
ra1l [238]2 years ago
8 0

Answer:

x + y=24  

x=24-y = 3x+5y=100  

3(24-y)+5y=100

72-3y+5y=100

72+2y=100

2y=28

y=14, since x=24-y

x=10

So there are 10 3-point questions and 14 5-point questions.

Dvinal [7]2 years ago
3 0

Answer:

the answer is <u><em>B</em></u>

Step-by-step explanation:

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a pencil cells at 18 Ghana cedis in an eraser class at 12 Ghana cedis how much will you pay if you buy three pencils and for era
antiseptic1488 [7]

You mean "four" erasers instead of "for" erasers​ which i corrected and solved.

Answer: You will pay 102Ghana cedis

Step-by-step explanation:

a pencil cells at 18 Ghana cedis

Three pencils will cost 3 x 18Ghana cedis=54 Ghana cedis

Also an eraser class at 12 Ghana cedis

Four erasers will cost 4 x 12 =48Ghana cedis

Total amount for three pencils and for erasers =54 Ghana cedis+48Ghana cedis=102Ghana cedis.

7 0
3 years ago
A quantity with an initial value of 9100 grows continuously at a rate of 0.85% per hour. What is the value of the quantity after
ycow [4]

Answer:

10,962,54

Step-by-step explanation:

we know that

The equation of a exponential growth is equal to

y=a(1+r)^x

where

a is the initial value  

r is the rate of growth

x is the time in hours

y is the value of the quantity

we have

a=9,100\\r=0.85\%=0.85/100=0.0085

substitute

y=9,100(1+0.0085)^x

y=9,100(1..0085)^x

For x=22 hours

substitute

y=9,100(1..0085)^{22} =10,962,54

4 0
3 years ago
Q # 15 I need help please to resolve
kow [346]

The sequence is

740, 707.60,675.20,642.80,...

Here first term is 740, and common difference, d is

707.60-740 = -32.40

Now we use the formula of nth term, which is

a_{n} = a+(n-1)d

Substituting the values of a,n and d, we will get

=740+(n-1)(-32.40), 23 months

Correct option is the second option .

7 0
3 years ago
Solve for x please help me
Mademuasel [1]

x = 51.98

Step-by-step explanation:

tan 68 = opp/hyp = x/21

or

x = 21×tan68°

= 21(2.475)

= 51.98

3 0
2 years ago
What is the exterior angle of #9 ?
Alexxandr [17]

Answer:

55

Step-by-step explanation:

3x-12=2x

    +12

3x=2x +12

    -2x

x=12

4(12)+ 9

48+9

=55

6 0
3 years ago
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