MATHEMATICS MIDDLE SCHOOL

Jen motorboat travels at a speed of 13mph in still water. Booth River flows at a speed of 3mph. How long will it take Jen to travel 11 mi upstream? 11mi downstream

Answers

Answer 1
Answer:

Answer:

Upstream 1.1 hours and down stream 0.6875 hours.

Step-by-step explanation:

Jen motorboat travels at a speed of 13 mph in still water.

Now, the speed of river flows is 3 mph.

Therefore, the upstream speed of the boat is (13 - 3) = 10 mph and the downstream speed of the boat will be (13 + 3) = 16 mph.

Therefore, to travel 11 miles upstream Jen will take (11)/(10) = 1.1 hours.

And to travel 11 miles down stream Jen will take (11)/(16) = 0.6875 hours. (Answer)

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Lindsay's estimated cost for the first year at a two year college and her assets are shown in the tables below. Lindsay uses her savings to pay for the year after the grant and scholarship are applied. How much more money does Lindsay have left in her savings? Tuition and fees: $7,800.00
Room and board: $6,725.00
Books and supplies: $1,200.00
Personal expenses: $2,225.00

Savings: $5,685.00
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First year scholarship: $3,750.00

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A: $895.76
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Answers

so we have to add the expenses and savings, and subtract them afterwards, lets call them negative and positive respectively to group them:
negative = tuition + room + book + personal
negative = 7800 + 6725 + 1200 + 2225
negative = 17950

positive = savings + grant + scolarship
positive = 5685 + 1500 + 3750
positive = 10935

we have to subtract the negative from the positive to have a grand total:
total = positive - negative = 10935 - 17950= -7015
that means that the savings, grant and scholarship are not enough to pay the total expenses, they lack $7015 indeed

What is 0.0000000345 in scientific notation?

Answers

Since the number is less that 1, the exponent will be a negative.
3.45X10^-8

Please help tysmmmmmmm

Answers

Answer: 3,200 inches





3,200 cubic inches

Write an expression that can be used to multiply 6 times 198 mentally

Answers

I would half 198, get
99 and add a 0, this is how you multiply by 5 in your head

198*5 = 990
990 + 200 = 1190 - 2
= 1188

Alternatively we can round 198 to 200: then multiply by 6

200*6 = 1200

Then We subtract the 6 "2's" that we added

1200 - 12 = 1188


The expression for this is:
(6*200) - (6 * 2)

As a salesperson, you are paid $50 per week plus $3 per sale. This week you want your pay to be at least $110. What is the minimum number of sales you must make to earn at least $110?

Answers

so 50 per week+3 times number of sales
represent s as number of sales
pay=50+3s
if you want pay to be at least 110 or pay<110 so
110>pay=50+3s
110>50+3s
treat as regular equation: do the saem to both sides so it will stay equal
also isolate the s term

110>50+3s
subtract 50 from both sides
60>3s
divide both sides by 3
20>s
you must make at least 20 sales
20 sales.. 110 minus 50 dollars for a WEEKS pay leaves 60 divided by 3 dollars a sale leaves 20 sales

Please could someone help me with these questions sorry about the scribbling on one page I got stuck

Answers

question 4
So the polygon has 10 sides, to calculate how much all the interior angles are summed up, you have to see how many triangles you can fit into the polygon (this works for any polygon), in this case it is 8 (see file attached). Therefore you do 8 x 180 = 1440, so the overall angle is 1440º. Now you do 1440 : 10, because there are 10 equal angles, and that is 144º. 
Every angle has 144º

question 5
Bearings are always measured clockwise and you always start north. You are at point A and want to go to point B, how much do you have to turn (clockwise!!)? 
345º
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