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Anika [276]
2 years ago
12

Can someone help me with this ?

Mathematics
1 answer:
zhannawk [14.2K]2 years ago
7 0

Answer:

50

Step-by-step explanation:

12x + 15 = 5x +  85   {Subtract 15 from both sides}

12x + 15 - 15 = 5x + 85 - 15  

          12x = 5x + 70        {Subtract 5x from both sides}

12x - 5x   = 70

         7x = 70         {Divide both sides by 7}

          x = 70/7

x = 10

∠U = 5x = 5*10 = 50

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Un = 5 x 21<br> What is the answer to this problem?
siniylev [52]

Answer:

N = 105/u

U = 105/n

Step-by-step explanation:

Let's solve for n.

un=(5)(21)

Step 1: Divide both sides by u.

nu/u = 105

un = 105/u

__________________________

Let's solve for u.

un=(5)(21)

Step 1: Divide both sides by n.

nu/n = 105/n

u = 105/n

4 0
3 years ago
"Gina wrote the following paragraph to prove that the segment joining the midpoints of two sides of a triangle is parallel to th
Aleonysh [2.5K]
What is the flaw in Gina’s proof?
A) Points D and E must be constructed, not simply labeled, as midpoints.

B) Segments DE and AC are parallel by construction.  THIS IS THE FLAW. THE SEGMENTS WERE NOT DRAWN NOR PROPERLY IDENTIFIED.

C) The slope of segments DE and AC is not 0.

D) The coordinates of D and E were found using the Distance between Two Points Postulate 
6 0
3 years ago
Read 2 more answers
0 ÷ 0 = 1
TEA [102]

Answer:

0/0 = undefined not 1

Step-by-step explanation: Undefined means there are no solutions possible for the operations in view. The example in question is itself wrong. n/0 is infinite but not undefined. 0/0 is undefined

7 0
2 years ago
in the lab, Tammy has two solutions thta contain alcohol and is mixing them with each other. She use twice as much Solution A as
Dmitry_Shevchenko [17]

Answer:

She uses 200 milliliters of solution B

Step-by-step explanation:

Notice that there are two unknowns in this problem: 1) the amount of solution A that is being used, and 2) the amount of solution B being used. We can name such unknowns with letters to facilitate our work:

Amount of solution A to be used = A

Amount of solution B to be used = B

So, since we need to find two unknowns, we need to create a system of two equations to solve them.

Our first equation can be obtained from the sentence: "She uses twice as much Solution A as Solution B," which written in mathematical form is:

A = 2 B

The second equation we can build from the information of the amount of alcohol in each solution that combined will add up to 104 milliliters of alcohol in the mixture. Knowing the percent of alcohol in each solution, we can write an equation for the amount of alcohol:

0.19 A + 0.14 B = 104

Now we can use our first equation to substitute A in terms of B in the second equation:

0.19 (2 B) + 0.14 B = 104

0.38 B + 0.14 B = 104

0.52 B = 104

B = 104 / 0.52

B = 200 milliliters

4 0
3 years ago
Find the volume of the entire figure to the nearest whole number. Use 3.14 for Pi.
Alja [10]

Answer:

1733.28 m³ or approximately 1733 m³

Step-by-step explanation:

Cone - 1/3πr²h

Cylinder - πr²h

Cone - 1/3(3.14)(6)²(10) ⇒ 376.8

Cylinder - (3.14)(6)²(12) ⇒ 1356.48

1356.48 + 376.8 = 1733.28 m³

Approximately 1733 m³

4 0
3 years ago
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