⚠️Please help ⚠️what is an ratio

If someone helps me with all of them i will mark them as brainliest

Harlamova29_29 [7]

Answer:

Step-by-step explanation:

1. (a) 24 X 3/4= 18 multiplication

you have to multiply to get a smaller answer since you are using a fraction.

2. (a) 24 / (-3/4)= -32 division

you have to divide to get a bigger number than started since you are using a fraction

3. (A) 12-15= -3 subtraction

when you subtract a bigger number than the first number you end up normally with a negative number

4. (a) 12 -(-15) subtraction

when you subtract with a negative number you distribute so the two negatives cancel out and it become an addition sign. (if you look at it the two negatives and the parenthesis looks like an addition sign (+)

5. (A) -18 / (-3/4) =24 division

when you divide two negative values you will always get a positive answer. And again dividing a fraction will get you a bigger answer.

8 0

3 years ago

Kathy bicycles 8km/h faster than Dennis. In my he same time it takes Dennis to bicycle 36 km, Kathy can bicycle 60 km. How fast

Sergeeva-Olga [200]

Dennis = 12 km'h

Kathy = 20 km/h

Step-by-step explanation:

Lets first establish that time is the same for both Kathy and Dennis and we can therefore assign is the value of t

Kathy is cycling 8km/h faster than Dennis. Therefore if Dennis is doing x km/h Kathy is doing (x+8)km/h

If it takes Kathy t time to cycle for 60 km at (x+8)km/h, we can derive the time t as;

(x+8)* t = 60

t = 60/(x+8)

We can now use this time to establsish how fast Dennis is cycling. Dennis, using a speed of x km/h takes the same time (60/(x+8)) to cycle for 36 km. Therefore;

x * 60/(x+8) = 36

= 60x/(x+8) = 36

36 (x + 8) = 60x

36x + 288 = 60x

288 = 60x – 36x

288 = 24x

12 = x

Dennis is cycling at 12 km/h

Kathy is doing x + 8

= 12 + 8 = 20 km/h

Learn More:

For more on deriving equations check out;

brainly.com/question/11888968

brainly.com/question/7742981

#LearnWithBrainly

8 0

3 years ago

At a little-known vacation spot, taxi fares are a bargain. A 63-mile taxi ride takes 72 minutes and costs $50.40. You want t

Mademuasel [1]

$26.60, take 72/50.40 to find how much money it is per minute. Set that equal to 38/x- x being the unit price you’re trying to find. Then cross multiply to get $26.60

5 0

3 years ago

Two part-time instructors are hired by the Department of Statistics and each is assigned at random to teach a single course in p

scZoUnD [109]

Answer:

The probability that they will teach different courses is $\frac{2}{3}$ .

Step-by-step explanation:

Sample space is a set of all possible outcomes of an experiment.

In this case we will write the sample space in the form (x, y).

Here x represents the course taught by the first part-time instructor and y represents the course taught by the second part-time instructor.

Denote every course by their first letter.

The sample space is as follows:

S = {(P, P), (P, I), (P, S), (I, P), (I, I), (I, S), (S, P), (S, I) and (S, S)}

The outcomes where the the instructors will teach different courses are:

s = {(P, I), (P, S), (I, P),(I, S), (S, P) and (S, I)}

The probability of an events E is the ratio of the number of favorable outcomes to the total number of outcomes.

$P(E)=\frac{n(E)}{N}$

Compute the probability that they will teach different courses as follows:

$P(\text{Different courses})=\frac{n(s)}{n(S)}=\frac{6}{9}=\frac{2}{3}$

Thus, the probability that they will teach different courses is $\frac{2}{3}$ .

3 0

3 years ago

Not only would I like the value of x, but also I wonder how I’d go about solving this problem?

notsponge [240]

Answer:

x = 58

Step-by-step explanation:

This question can be solved by using the exterior angle property, which states that the exterior angle of a triangle = the sum of the two opposite interior angles.

62 lies on a line, so the exterior angle is 180 - 62, or 118 degrees.

Using the EAP, we can conclude the following:

(x + 2) + (x) = 118

2x + 2 = 118

2x = 116

x = 58

Hope this helps

4 0

2 years ago

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