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Vlada [557]
3 years ago
5

A student can solve 20 problems in 30 minutes. How long would it take him to solve 50 problems? Answer fast please.

Mathematics
2 answers:
stiks02 [169]3 years ago
7 0
The answer will be 60
anzhelika [568]3 years ago
6 0

Answer:

1 hour 15 minutes

Step-by-step explanation:

20 questions is 30 minutes

40 questions is 1 hour

10 questions 15  minutes because half of 20 question is 10 so half of 30 minutes is 15 minutes

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Find two positive consecutive integers whose product is 132.
iren2701 [21]
If x is the first integer, then x+1 is the second. x(x+1)=132 or x^2+x-132=0. This factors as (x-11)(x+12)=0. Thus either x=11 or x=-12 
<span>So either 11 and 12 or -12 and -11 will do.</span>
7 0
3 years ago
6x-27=-3x<br><br> solve for x:D
son4ous [18]

Answer:

6×-27=-3×

+3×

9/9×=27/9

×=3

7 0
3 years ago
Given ∆ABC, with a = 9 , b = 8 and c =13, find angle c
strojnjashka [21]

Answer:

angle c is 13 as it said in the question

Step-by-step explanation:

6 0
3 years ago
What is the experimental probability that both coins land on the same side on Isidro’s next toss
Musya8 [376]

Answer:

1/2, or 0.5

Step-by-step explanation:

There are 4 ways that 2 coins can fall...

Both heads (this satisfies our situation)

1st coin heads, 2nd coin tails

1st coin tails, 2nd coin heads

Both tails (this satisfies our situation)

We have 2 out of 4 ways to satisfy this situation, so our experimental probability is

P = 2/4 which reduces to

 P = 1/2 , or 0.5 as a decimal

3 0
3 years ago
Peter Schmidt ordered sandwiches and salads for a luncheon meeting. The sandwiches cost three times as much as a salads. The tot
evablogger [386]

EXPLANATION

Let's see the facts:

$Sandwiches= 3*$Salads

Bill = $24.92

We can represent this in an equation:

Total Bill = Sandwiches + Salads

Let's call to Sandwiches "x" to Salads "y" and to Bill "B"

Then, the equation will be:

B = x+y = (3*y) + y

Applying distributive property:

24.92 = 3y + y

Adding similar terms:

24.92 = 4y

Dividing both sides by 4:

6.23 = y

Switching:

y=6.23

As we know, y variable represent the salads cost, so:

Answer is $6.23.

3 0
1 year ago
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