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Alex
2 years ago
13

Jessica and Mike are making presentations for a class project. Jessica's slideshow starts with a verbal introduction that is 16

seconds long, and then each slide is left up for 2 seconds. Mike leaves each slide on screen for 3 seconds, and his introduction lasts 10 seconds. Jessica and Mike notice that their presentations have both the same number of slides and the same duration. How many slides are in each presentation? How long is each presentation? Explain why.
Mathematics
1 answer:
uysha [10]2 years ago
6 0

Answer:

they both has 7 slides and the presentation had a duration of 28 seconds

Step-by-step explanation:

we have to setup equation that makes them equal to each other if you know what i mean. 2x+16=3x+10

then we just solve for x

2x+16=3x+10

subtract 10 from each side

2x+6=3x

step 2 subtract 2x from each side

x=6

so both of their presentations are 7 slides long

then to find the length of their presentations we just plug in 6 to one of the equations

2(6)+16

2x6=12 12+16=28 so both of their presentations were 28 seconds

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Which of the following expressions is not equivalent to -4.5 • -8?
strojnjashka [21]

Answer: (8)(-4.5)

Step-by-step explanation: If you were to multiply -4.5 • -8 it would be a positive number but if you multiply (8)(-4.5) that would equal a negative number

5 0
3 years ago
What is the m∠B?<br> 28°<br> 40°<br> 102°<br> 112°
Vlad1618 [11]

Answer:

112

Step-by-step explanation:

180 - 40 - 28 = 112

4 0
2 years ago
Read 2 more answers
Please answer ASAP! The Fergusons decided to book the room at the price that Mrs. Ferguson was given, $2075, because it included
Alex787 [66]
So what you should do is
15% off, then add tax or
2075 times 0.85 times 1.185=2090.04 about

you can't just add and subtract percents because they are percents of different things

what he did was
he found 15% of 2075 and 18.5% of 2075 then found the difference and added to 2075 to find his total

what he should have done is
found the discounted price (15% off) then found the tax on that


first way
2075 times 0.15=311.25
2075-311.25=1763.75
1763.75 times 0.185=326.29375
1763.75-326.29375=2090.04

2nd way (easy, if you understand commutative property and stuff)
100-15=85
1+0.185=1.185
2075*0.85*1.185=2090.04


answer should be $2090.04
7 0
3 years ago
The scale of a map says that 4 cm represents 5 km.
andriy [413]

Answer:

a. 3.2 cm

b. 6.25 km

Step-by-step explanation:

a.

(4 km)/(5 km) = 0.8

4 km is 0.8 of 5 km, so in the map it is 0.8 of 4 cm.

0.8 * 4 cm = 3.2 cm

Answer: 3.2 cm

b.

(5 cm)/(4 cm) = 1.25

5 cm is 1.25 times 4 cm, so it represents 1.25 * 5 km.

1.25 * 5 km = 6.25 km

Answer: 6.25 km

3 0
3 years ago
Solve the question m/5= 5 what’s M
kati45 [8]
If you have m/5 = 5, then M would have to be divisible by 5, and in this case the square of five. So the answer is m = 25. 

Hope this helps!

7 0
2 years ago
Read 2 more answers
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