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salantis [7]
3 years ago
7

True or False. Is (3,1) a solution to this system:

Mathematics
1 answer:
Alisiya [41]3 years ago
8 0

It would be false since none of them are equal to 1.

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Which figures can be used to find the area of the composite figure? Choose exactly two answers that are correct. A. a rectangle
Romashka [77]
B and C is the correct answer
3 0
3 years ago
An engineer needs to determine the distance across a river without swimming to the other side. The engineer notices a tree on th
nasty-shy [4]

Answer:

Step-by-step explanation:

The engineer can use a clinometer to measure the angle of elevation of the top of the tree. Let the height of the tree be represented by x, the she could determine the distance across the river, d, by applying the trigonometric function.

Tan θ = \frac{opposite}{adjacent}

           = \frac{x}{d}

the the distance, d = x ÷ Tan θ

Assume the angle of elevation of the top of the tree is 30^{o}, and the height of the tree is 10 m, then the distance, d, across the river would be;

d = \frac{10}{0.5774}

  = 17.3190

d = 17.32 m

The sketch to the explanation is attached to this answer for more clarification.

4 0
3 years ago
What is 15 = -y + 10
Murrr4er [49]
It's a simple linear equation in a single variable, 'y' .  Its solution is the number
that 'y' must be in order to make the equation a true statement.  Here's how to
find the solution:

Write the equation:    <span>15 = -y + 10

Subtract 10 from each side:    5 = -y

Multiply each side by -1 :      <u>-5 = y</u>
</span>
7 0
3 years ago
Read 2 more answers
Let f(x)=3x^2+6x find f(2)<br><br>A.-4<br>B. 0<br>C. 4<br>D. 8
Anon25 [30]

Answer:

B maybe? that doesnt equal any

Step-by-step explanation:

f(x)=3x^2+6x

f(2)=3(2)^2+6(2)

f(2)=3(4)+12

f(2)=12+12

f(2)=24

7 0
3 years ago
Please help ASAP for question b
zlopas [31]

Answer: The height of the new player is 210 cm

Step-by-step explanation: The previous mean of the entire team has been calculated as 200.3

What this means is that, we have a summation of the observed data and a summation of the frequency of data.

The mean was calculated as

Sum FX/Sum F = 200.3

Where Sum FX is 2604 and Sum F is 13

However, our calculation should now read thus,

Sum FX/Sum F = 201 {where 201 is the new mean}

By cross multiplication we now have

Sum FX = Sum F x 201

Remember that a new member has joined the team so our Sum F is now 14 and we can now express it as thus

Sum FX = 14 x 201

Sum FX = 2814

If the summation of the observed data after adding a new team member is now 2814, then the addition to the previous observed data would be

2814 - 2604 = 210

So the height of the new member added to the team is 210 cm.

6 0
3 years ago
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