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Snowcat [4.5K]
3 years ago
7

Math questions down below

Mathematics
2 answers:
lbvjy [14]3 years ago
3 0
= 5/3 x (-7/2)
= -35/6
= -5 5/6

answer A.
-5 5/6
labwork [276]3 years ago
3 0
Convert both mixed numbers to improper fractions:
5/3 and -7/2
Use the formula for multiplying fractions:
5*(-7)/ 3*2
-35/6
Convert to a mixed number.
The answer is (A) -5 5/6
You might be interested in
Area of the Shaded Region rectangle within reactanlge
Alik [6]

Answer:

132

Step-by-step explanation:

First you need to find the area of both regions (shaded and not shaded)

To find the shaded regions area multiply length by width

20 x 8 = 160

Then find the area of the unshaded region

7 x 4 = 28

Finally subtract the unshaded region from the shaded region

160 - 28 = 132

7 0
3 years ago
What is 7P4<br><br><br><br> A: 28<br><br> B: 35<br><br> C: 210<br><br> D: 840
Semmy [17]

Answer:

D

Step-by-step explanation:

using the definition of nP_{r} = \frac{n!}{(n-r)!}

where n! = n(n- 1)(n - 2)......× 3 × 2 × 1

here n = 7 and r = 4, hence

7P_{4}

= \frac{7!}{3!}

= \frac{7(6)(5)(4)(3)(2)(1)}{3(2)(1)} ← cancel 3 × 2 × 1 leaving

7P_{4} = 7 × 6 × 5 × 4 = 840 → D


4 0
2 years ago
Read 2 more answers
Draw a model to represent the ratio 1 to 3. Describe how to use the model to find an equivalent ratio. Please help I'm really st
Gnesinka [82]

Answer: See below

Step-by-step explanation:

Make a table with first set of numbers as 1,3. Multiply both the numbers of this set sequentially by natural numbers to get the following table

1   2  3  4    5    6     7    8     9      10......

3  6  9  12  15    18   21   24   27    30......

We see that in each set of numbers the 2nd number is 3 times the first number.

If we plot these sets of numbers on a graph paper, we get a model depicting all the points which satisfy this ration requirement.

3 0
3 years ago
The length of a rectangular garden is 3 inches greater than twice it’s width find the dimensions if the perimeter is 24 inches
mel-nik [20]

Answer:

width=3

length=9

Step-by-step explanation:

1/2 perimeter: 24/2=12

let x: width; y: lenght

y=2x+3

x=12-y

y=2(12-y)+3

y=24-2y+3

y+2y=27

y=9

x=12-9=3

4 0
3 years ago
Suppose a researcher is testing a new vaccine on mice to see how well it prevents the flu virus. The lab has 1000 mice available
AfilCa [17]

Solution :

Sampling may be defined as the technique of selecting the individual members or the subset of the population to make a statistical inferences and estimates the characteristics of the entire population.

There are several sampling methods. This includes : Systematic sampling, clustered sampling, stratified sampling, quota sampling, judgement sampling, random sampling, convenience sampling and many more.

In the context, the sampling methods for each of the descriptions are :

a). The researcher use computer program to randomly choose a sample of 30 mice of the 1000 mice for using her study

   --- Simple Random

b). The researcher chose the 1st 30 mice as she can reach the door to the mouse room

   --- Convenience sampling

c). The mice those whose are kept in the cages on 10 various shelves in mouse room. The researcher or the experimenter chose the three mice from each shelve.

  ---- Stratified sampling

d). Each of the cage have 5 mice and the researcher randomly chooses 6 cages for her study

----- Cluster sampling

e). The researcher generates the list of the identification numbers which has been sorted from the smallest to the largest. The researcher randomly picks 1 mouse form the list and selects every 4 mouse until the researcher has 30 mice.

 ---- Systematic sampling

7 0
3 years ago
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