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Diano4ka-milaya [45]
3 years ago
6

PLEASE HELP!!

Mathematics
2 answers:
Korvikt [17]3 years ago
8 0
A I guess (finger crossed )
Scrat [10]3 years ago
4 0

Answer:

C. ΔABC has been dialated using C as the center.

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a boat going upstream at 4 mph then travels downstream at 10 mph. what is the rate of the boat in still water​
elixir [45]

Answer:

7 mph

Step-by-step explanation:

If b is the rate of the boat, and s is the rate of the stream, then:

b − s = 4

b + s = 10

Solve the system of equations with substitution or elimination.  Using elimination, add the equations together:

2b = 14

b = 7

The boat's rate is 7 mph.

7 0
3 years ago
Remove parentheses and simplify 7a+6b-4 (3a-3b)
Varvara68 [4.7K]
Normally, you would do whatever is inside of the parenthesees first then do the rest but we cant get any further so we remove the parenthasees by distrubtion

7a+6b-4(3a-3b)
-4(3a-3b)
a(b+c)=(ab)+(ac)
-4(3a-3b)=-12a-(-12b)

7a+6b-12a+12b
7a-12a+6b+12b
-5a+18b
that's the asnwer
7 0
3 years ago
A political pollster wants to know what proportion of voters are planning to vote for the incumbent candidate in an upcoming ele
balandron [24]

Answer:

1.\ \ np\geq 10\\\\2.\ \ n\geq 10x

Step-by-step explanation:

-Let x be the sample size and n the population size

-The conditions for a one-sample proportion z-test are:

-The sample is randomly selected from the population.

-The sample size is greater than or equal to ten times the population size:

n\geq 10x\\\\n=2000\\x=150\\10x=1500\\\therefore n\geq 10x

-The expectation np is greater than or equal to 10:

np\geq 10\\n=2000, p=0.6\\np=1200\\\\Hence, np\geq 10

5 0
4 years ago
Sulfur powder (S) and oxygen gas (02) undergo a
aleksandr82 [10.1K]

Answer:

It’s a

Step-by-step explanation:

8 0
3 years ago
Find a solution to the linear equation y=−x+7 by filling in the boxes with a valid value of x and y.
sladkih [1.3K]

Answer:

(x,y) = (0,7)

(x,y) = (3,7)

Step-by-step explanation:

The question and the attached image are different. However, the attached image answers the question y = -4 correctly.

So, I will solve for: y = -x + 7

Given

y = -x + 7

Required

Possible values of x and y

Let x = 0:

y = -x + 7

y = -0 + 7

y = 7

So, we have:

(x,y) = (0,7)

Let y = 4

y = -x + 7

4 = -x + 7

Collect Like Terms

x = -4 + 7

x =3

So, we have:

(x,y) = (3,7)

<em>So, all you need to do is: assume a value for either x or y, then solve for the other variable.</em>

6 0
3 years ago
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