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klemol [59]
3 years ago
5

Can someone answer #10 please?

Mathematics
1 answer:
n200080 [17]3 years ago
8 0
Not sure of the question...1 missing vs 8 found
or 1 missing vs 9 piece puzzle

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A boat traveling upstream goes 84 kilometers in 7 hours. If the return trip takes only 3 hours, what is the speed (in kilometers
Hunter-Best [27]
Speed = Distance ÷ time 

Speed upstream = 84 ÷ 7 = 12 km/h

Speed downstream = 84 ÷ 3 = 28 km/h

Speed in still water = 1/2(28 + 12) = 20 km/h

Answer: 20 km/h
8 0
3 years ago
PLS HELLP PLS PLS
Andrew [12]

Answer:

it would be 100 rounded because 14x8=112 and 112 is rounded to 100 to the nearest hundreth. Please subscribe to Amiredagoat Yt

Step-by-step explanation:

6 0
2 years ago
A bakery sells mocha cupcakes and chocolate cupcakes. One day it sold 161 mocha
anzhelika [568]

Answer:

35%

Step-by-step explanation:

35% percent of the cupcakes were mocha

8 0
3 years ago
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What is a statement of equality?
Tju [1.3M]

Answer:

the equality between A and B is written and pronounced A equals to B

7 0
3 years ago
Solve for x: x^2 + 14x + 49
Kaylis [27]

Answer: -7twice

Step-by-step explanation:

This is a question on root of quadratic equation. The interpretation of the question

x² 14x + 49 is

x² + 14x + 49 = 0.meaning that we are to find two possible values for x that will make the expression equal 0.

We can use any of the methods earlier taught. For the purpose of this class, I am using factorization methods

x² + 14x + 49 = 0

Now, find the product of the first and the last terms, is

x² × 49 = 49ײ

Now find two terms such that their productbis 49x² and their sum equals 14x, the one in the middle.

We have several factors of 49x² but only one will give sum of 14x. Because of the time, I will only go straight to the required factors .

49x² = 7x × 7x and the sum gives 14x the middle terms..

Now we now replace the middle one by the factors and then factorize by grouping.

x² + 14x + 49 = 0

x² + 7x + 7x + 49 = 0

x(x + 7) + 7(x + 7) = 0

(x + 7)(x + 7). = 0

Now to find this value of x,

x + 7 = 0

x. = -7twice.

The root of the equation = -7twice.

3 0
3 years ago
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