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rodikova [14]
4 years ago
13

alt=" - 3y {}^{2} = - 75" align="absmiddle" class="latex-formula">
​

Mathematics
1 answer:
Paraphin [41]4 years ago
7 0

Answer:

The answer will turn out to be y= 5 or y= -5.

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“Twelve decreased by twice a number equals-34. Write an equation for this situation and then find the number”
OLga [1]
2x-12=34 is the equation.
x=23

Explanation: "Twelve decreased" means that the number 12 is taken away from a certain amount. This certain amount is "twice a number" which means double a value. This value is the number that we do not know, so I used 'x' as a variable placeholder for this number. This is how I got the equation.

I then solved the equation using algebra to find the value of x. You begin this process by adding 12 to 34, which equals 46. I then divided this number by 2, which equals 12. This is the most simplified the equation can get, so 12 is the value number we are looking for.
8 0
3 years ago
Tom has three times as many pencils as pens but has a total of de 100 writing utensils. How many pencils and pens does toms have
IrinaVladis [17]

Answer:

Tim has 75 pencils and 25 pens

Step-by-step explanation:

To solve this create a system of equations. To do so, first create an equation for the total number of utensils that he has. Let x equal the number of pencils and y equal the number of pens.

x+ y = 100

Now make one for the comparison of the two and solve for the constant.

x = 3y

x - 3y = 0

Now to solve the system, multiply the second equation by -1 and add them together.

x + y = 100

-x + 3y = 100

-----------------

4y = 100

y = 25

Now that we have the number of pens, find the number of pencils using an equation.

x + y = 100

x + 25 = 100

x = 75

7 0
3 years ago
If p is the incenter of triangle jkl, find each measure
Hunter-Best [27]

Answer:

PO = 7

PM = 7

MJ = 11

∠PJO = 32°

∠KJL = 64°

PL ≈ 18.385

OL = 17

∠PLO = 22°

∠NLO = 44°

∠JKL = 72°

∠MKP = 36°

∠NKP = 36°

∠PKN = 36°

KN = 10

PL ≈ 13.04

PK ≈ 12.21

JL = 28

JK = 21

LK = 27

Step-by-step explanation:

The given parameters are;

The point representing the incenter of the triangle = P

Therefore PO = PM = PN = 7

tan(32°) = PM/JM = 7/JM

∴JM = 7/(tan(32°)) ≈ 11.2

∠PJO = tan⁻¹(7/11)≈ 32.47°

∠PJO = ∠PJM = 32° similar triangles

∠KJL = ∠KJP + ∠PJO = 32 + 32 = 64°

∠KJL ≈ 64°

PL = √(7² + 17²) ≈ 18.385

OL = NL = 17 similar triangles

∠PLO = sin⁻¹(7/18.385) ≈ 22.380°

∠PLO = ∠PLN = 22°

∠NLO = ∠PNL + ∠OLP ≈ 22° + 22° ≈ 44°

∠NLO ≈ 44.380°

∠JKL = 180 - (∠KJL + ∠NLO)

∠JKL = 180° - (64° + 44°) ≈ 72°

∠JKL  ≈ 72°

∠MKP = ∠NKP = 72°/2 = 36°

∠MKP = 36°

∠NKP = 36°

∠PKN = ∠JKL - ∠MKP = 72° - 36° ≈ 36°

∠PKN  ≈ 36°

KN = KM = 10

MJ = OJ = 11

PL = √(7² + 11²) ≈ 13.04

PK = √(7² + 10²) ≈ 12.21

JL = JO + OL = 11 + 17 = 28

JK = JM + MK = 11 + 10 = 21

LK = LN + NK = 17 + 10 = 27

6 0
3 years ago
Choose SSS, SAS, or neither to compare
yulyashka [42]

Answer:

SSS

Step-by-step explanation:

All sides are equal by SSS......

8 0
3 years ago
Read 2 more answers
A company sells bath oils contained in spherical, water-soluble pods. The circumference of each spherical pod is 37.68 millimete
77julia77 [94]

Hello!

First of all, to find the volume we will want to find the radius. First let's divide our circumference by pi.

37.68/3.14=12

We find half of this for the radius.

12/2=6

Now we use the formula V=\frac{4}{3} \pi r^{3}. We will solve below.

V=\frac{4}{3} \pi (6^{3} )

V=\frac{4}{3} \pi(216)

V\approx \boxed {904.32}

Therefore, our answer is about 904.32 ml³.

I hope this helps!

6 0
3 years ago
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