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MariettaO [177]
4 years ago
10

Solve the system by substitution. -x-y-z=-8 -4x+4y+5z=7 2x+2z=4

Mathematics
1 answer:
alexandr402 [8]4 years ago
5 0
1. x=−y+8−z 2.x=−​7−4y−5z (everything over 4) ​​ 3.x=2−z 1.y=-x+8-z 1.z=-x+4-y 2.y=7+4x-5x (everything over 4) 2.z=7+4x-4y (everything over 5) 3.z=2-x
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The height of a building on a 1/4 inch: 1 foot scale drawing is five inches tall. How tall is the actual building?
Alexandra [31]

Answer:

20 inches

Step-by-step explanation:

1/4 ==> 1

20 fourths in 5

4 ==> 20

7 0
3 years ago
How would you convert the repeating, nonterminating decimal to a fraction? Explain the process as you solve the problem. 0.1515
Aleonysh [2.5K]
Hey there!

To convert the repeating nonterminating decimal into a fraction, you would ROUND.

Round 0.1515 into 0.2

Now, make a fraction.

2/10, which can be simplified into 1/5.

I hope this helps!
3 0
4 years ago
Please help me please help me please help me
MissTica

Answer:

B.50

Step-by-step explanation:

The two angles form a right angle ( indicated by the little square )

Right angles have a measure of 90 degrees

Hence, x + 10 + 30 = 90

( Note that we just created an equation that we can use to solve for x )

We now solve for x using the equation we created

x + 10 + 30 = 90

Combine like terms

x + 40 = 90

Subtract 40 from both sides

x = 50

3 0
3 years ago
Find the area of a circle if its circumference is 10 pi
AleksandrR [38]

Answer:

25π

Step-by-step explanation:

pi's symbol is π, which will be used sometimes to make it easier later

The circumference is equal to diameter multiplied by pi. (Diameter is the length across the circle, radius the center of the circle to an edge point aka. half the diameter, and circumference is the edge length aka. perimeter of the circle.)

We can then remove the pi off the 10, as the diameter multiplied by pi is the circumference, so the diameter is 10.

Half of 10 is 5, the radius.

The formula for area of a circle is radius squared times pi, remember easily by π r ^2

We can plug in the radius into the formula to get

π 5 ^2

And finish it by solving the square root to get

π 25

25π

8 0
3 years ago
Write the expression in factored form: 16m4 power - n4 power
andre [41]
16m^4 - n^4
= (4m^2 + n^2)(4m^2 - n^2)
= (4m^2 + n^2) (2m + n)(2m - n)
4 0
4 years ago
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