Simplify and explain your answer 4/7+2/5(1/5+1/10)

Answers

Answer 1

Answer: $(4)/(7)+(2)/(5)\cdot((1)/(5)+(1)/(10))=(4)/(7)+(2)/(5)\cdot((2)/(10)+(1)/(10))=(4)/(7)+(2)/(5)\cdot(3)/(10)=(4)/(7)+(1)/(5)\cdot(3)/(5)\n\n=(4)/(7)+(6)/(25)=(4\cdot25)/(7\cdot25)+(6\cdot7)/(25\cdot7)=(100)/(175)+(42)/(175)=(142)/(175)$

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On a coordinate plane, the coordinates of vertices R and T for a polygon are R(−6, 2) and T(1, 2). What is the length of Side RT of the polygon? PLZ HELP ME!!!!!!!!!!!!!!!!!!

Answers

Answer:

7 units

Step-by-step explanation:

Use distance formula between two points $A(x_A,y_A)$ and $B(x_B,y_B):$

$AB=√((x_A-x_B)^2+(y_A-y_B)^2)$

On a coordinate plane, the coordinates of vertices R and T for a polygon are R(−6, 2) and T(1, 2). Then the length of the side RT is

$RT=√((-6-1)^2+(2-2)^2)=√((-7)^2+0^2)=√(49)=7\ units$

Answer:

toodly doo my friends its 55!

Step-by-step explanation:

Paige is a student in Mrs. Harding,where there are 10 boys and 14 girls.Mrs Harding is randomly selecting a student to do this week's presentation.What is the probability that Paige will be selected to do this week's presentation?

Answers

1:23

considering there's one Paige to 23 other students

The effect of the time of day a science class is taught on test scores is beingstudied in an experiment. Giving every student in the experiment the same
final exam is an example of which experimental design principle?

A. Randomization
B. Blocking
C. Direct control
D. Replication

Answers

Answer:replication

Step-by-step explanation:

Final answer:

In the experiment, giving every student the same final exam is an example of direct control. This experimental design principle ensures that all other variables are kept constant so that any differences in the outcome can be attributed only to the variable being tested.

Explanation:

In this experiment studying the effect of the time of day a science class is taught on test scores, giving every student in the experiment the same final exam is an example of the experimental design principle known as direct control. The direct control principle ensures that all other variables except the one being tested (in this case, the time of day) are kept constant. This is done to make sure that any differences observed in the outcome (the test scores in this case) can be attributed only to the variable being tested. Therefore, all students taking the same exam ensures that the difficulty of the test doesn't affect the results.

Learn more about Direct Control here:

brainly.com/question/34182807

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A horizontal line passes through the point (5, –1). Which point is also on this line?(0, 0)
(–1, 5)
(5, –4)
(–2, –1)

Answers

If a horizontal line passes through the point (5;-1) then the equation if this line: y=-1

Each point (x;-1) is also on this line.

Answer:(-2;-1)

Answer:

the answer is D (–2, –1)

Step-by-step explanation:

Hope this helps!

The ratio of shoes sold to sandals was 5:2.If there were 40sandals sold,how many shoes were sold?

Answers

$5x-\ number\ of\ shoes\n2x-\ number\ of\ sandals\n\n40=2x\ \ \ | divide\ by\ 2\nx=20\n\n5x=5*20=100\n\nThere\ were\ 100\ shoes\ sold.$

Answer:

Emily solved for a part when she should have solved for the whole. 875,000 should be the numerator of the equivalent ratio. 70 x 12,500 is 875,000. So the answer is 100 x 12,500 which is 1,250,000.

Step-by-step explanation:

A cat heart beats about 130 beats per minute .A kitten heartbeat can be as fast as 240 beats per minute.How many times does a kittens heart beat in one half hour?

Answers

21,600 minutes because 1 hour equals 60 mins. while half in an hour is 30 mins. and 60 + 30 = 90 so you multiply 240 by 90 getting 21,600

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