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Alex73 [517]
2 years ago
8

7 time 45 please i need help this for the class

Mathematics
1 answer:
Anika [276]2 years ago
8 0
315 is the answer pls give brainly
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Find the value of 5x - 2y+ 3z when x = 7 , y = 11 and z = -1
Oksanka [162]
By replacing you get:

5*7-2*11+3*(-1) = 35-22-3= 10

so the answer is 10.

If you like my answers, feel free to follow me and ask me more maths problems. :)
7 0
3 years ago
Read 2 more answers
an engineer decides to use similar triangles to find the distance across the river she makes the diagram below which triangles t
sergiy2304 [10]
<h2>Explanation:</h2><h2 />

The missing diagram is shown below. Remember that shapes are similar if you can turn one into the other by moving, rotating, flipping, or scaling. So this means you can make the object bigger or smaller. So in this case, we know that ΔABC is similar to ΔDEF. If so, we can establish the following proportion:

\frac{h}{56.7}=\frac{17.2}{52.4} \\ \\ h=56.7\times \frac{17.2}{52.4} \\ \\ h=18.61m

Our goal is to find x. So by Pythagorean theorem:

x=\sqrt{17.2^2+18.61^2} \\ \\ \boxed{x=25.34m}

Conclusion:

<em>ΔABC ~ΔDEF</em>

<em>Distance across the river is 25.34m </em>

8 0
3 years ago
There are between 25 and 43 students in a class
Vinil7 [7]

Answer: 36

Since the sum of the ratios is 5+7=12

the total number of students must be divisible by 12

The only number within the given range is 36

6 0
3 years ago
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Which algebraic expression represents the phrase “the quotient of negative eight and the sum of a number and three”?
morpeh [17]

Answer:

The answer is A. \frac{-8}{g+3}

Step-by-step explanation:

8 0
3 years ago
Y=2x+6, 3y=x-2 solve for unknown variables
11Alexandr11 [23.1K]

Step: Solvey=2x+6for y:

y=2x+6

Step: Substitute2x+6foryin3y=x−2:

3y=x−2

3(2x+6)=x−2

6x+18=x−2(Simplify both sides of the equation)

6x+18+−x=x−2+−x(Add -x to both sides)

5x+18=−2

5x+18+−18=−2+−18(Add -18 to both sides)

5x=−20

5x/5=−20/5

(Divide both sides by 5)

x=−4

Step: Substitute−4forxiny=2x+6:

y=2x+6

y=(2)(−4)+6

y=−2(Simplify both sides of the equation)

Answer:

x=−4 and y=−2

<u><em>I</em><em> </em><em>hope</em><em> </em><em>it</em><em> </em><em>helps</em><em> </em><em>you</em></u>

3 0
2 years ago
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