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Damm [24]
3 years ago
10

GIVING BRANLIEST!!!!!! 1O POINTS Tiffany is taking a 42-question test worth 100 points. The test includes two-point and four-poi

nt questions. How many of each type of question are on the test?
Which equations represent the scenario, where t represents the number of two-point questions and f represents the number of four-point questions? Check all that apply.
t + f = 42
t + f = 100
2t + 4f = 42
2t + 4f = 100
4t + 2f = 100
Mathematics
2 answers:
luda_lava [24]3 years ago
7 0

Answer:

2t + 4f = 100

t+f =42

Step-by-step explanation:

t= two point questions

f =four point questions

2t + 4f = 100

t+f =42

there are 34  two point questions and 8 four point questions

to solve multiply the second equation by -2

-2t -2f = -84

add this to 2t +4f = 100

2t + 4f = 100

-2t -2f = -84

-----------------------

2f = 16

divide by 2

f = 8

there are 8 four point questions

t+f=42

t+8 = 42

subtract 8

t = 34

there are 34 2 point questions

jolli1 [7]3 years ago
7 0

Answer:

2t + 4f = 100

t+f =42

Step-by-step explanation:

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J) You spend $35. Tip is 15%. How much did you pay in total?
rusak2 [61]

Answer:

You paid $40.25 in total.

Step-by-step explanation:

In this question:

Spending of 35%

Tip of 15% means that 15% of 35 will be added to your total spending. So

T = 35 + 0.15*35 = 35 + 5.25 = 40.25

You paid $40.25 in total.

3 0
3 years ago
If the length of the minute hand of the clock in London commonly known as “Big Ben” is 11.25’ from the center of the clock to th
rodikova [14]
First, we should figure out the area of the entire face of the clock because we need that information to solve the problem. The formula for the area of a circle is A=pi*r^2. Since we know that r (radius) is equal to 11.25 feet, we can plug this in for r and solve for A: A=pi*11.25^2 which equals A=397.61 ft^2 rounded to the nearest hundredth. 

Now, to find the area the hand sweeps over in 5 minutes, we should determine how much of the clock the hand sweeps over in 5 minutes. Think about it like this: since 5 minutes goes into 60 minutes 12 times (60/5=12), then 5 minutes is one twelfth of the clock's face. Therefore, we are going to divide the total area by 12 (397.61/12) to get 33.13 ft^2, so the answer is C.

I hope this helps.
5 0
4 years ago
A 500 g model train car traveling at 0.8 m/s collides with a 300 g stationary car. The cars hook up and move off down the track
sdas [7]

Answer:

0.5ms^{-1}

Step-by-step explanation:

Let v be the speed after the collision of both the cars.

Now, momentum is given by: mass × velocity, then by equating the total momentum before and after the collision of the two cars, we get

500{\times}0.8+300{\times}0=(500+300)v

⇒400+0=800v

⇒400=800v

⇒v=0.5ms^{-1}

Thus, they are moving at the velocity of 0.5ms^{-1}

3 0
4 years ago
Read 2 more answers
Help me solve this problem please
BabaBlast [244]

Answer:

x=-10

Step-by-step explanation:

15-2(x+5)=25

multiply the 2 by the x and 5 and you get

15-2x-10=25

since the 15 and the negative 10 are on the same side you add them together and get

5 -2x= 25

-5       -5

-2x =20

Then divide the -2/20= -10

3 0
3 years ago
Read 2 more answers
If x = 5 and y = -4, evaluate this expression: (-2x + 10) - (-6x + 5y + 12) + (x + 8y - 16) A) -5 B) 0 C) 5 D) 10
Anni [7]
The answer is A) -5 (if you get the app math papa you can plug in the equation and plug in the values to get the answer.)
6 0
3 years ago
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