MATHEMATICS MIDDLE SCHOOL

Algebra: Find x
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Algebra: Find x .... - 1

Answers

Answer 1
Answer:

Answer:

d

Step-by-step explanation:

The triangles are similar, thus the ratios of corresponding sides are equal, that is

(2x+1)/(x+4) = (40)/(25) = (8)/(5) ( cross-  multiply )

5(2x + 1) = 8(x + 4) ← distribute parenthesis on both sides )

10x + 5 = 8x + 32 ( subtract 8x from both sides )

2x + 5 = 32 ( subtract 5 from both sides )

2x = 27 ( divide both sides by 2 )

x = 13.5 → d

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HELP ME FAST PLEASE, PLEASE

Answers

Vcone=(1/3)hpir^2
base=diameter=2rdaius=6
diameter/2=3=radius
height=9.2

Vcone=(1/3)(9.2)pi(3^2)
Vcone=9.2pi3
vcone=27.6pi cm^3
aprox pi=3.141592
vcone=86.707 cm^3

round
86.7 cm^3

Vcone=(1/3)hpir^2

base=diameter=2rdaius=6

diameter/2=3=radius

height=9.2

Vcone=(1/3)(9.2)pi(3^2)

Vcone=9.2pi3

vcone=27.6pi cm^3

aprox pi=3.141592

vcone=86.707 cm^3

round

86.7 cm^3

How can you make 16 dollars using exactly and only 3 bills, one of which is not a 10-dollar bill?

Answers

That would be by using a $1 bill, a $5 bill, and a $10 bill. Either the $1 bill or the $5 bill qualify as the "one of which is not the $10 bill". It's a matter of translating the question.

Sasha drove from her house to the grocery store in 20 minutes. Her return trip took 15 minutes. If the store is 7 miles from her house, what was Sasha's average speed for the round trip, in miles per hour?

Answers

Total time = 35 minutes
Total distance = 14 miles

I would set this up as a proportion

14/35 = x/60  (60 minutes in an hour)
Now cross multiply and solve.
35x = 840
840/35 = 24 mph
distance = rate * time
7 miles = rate * 20 minutes 
7/20 = 20r/20
r = 0.35 mph

Plz help me!!! i will only mark brainlylest 4 a true answer!!!!

Answers

Answer:

2. is y=1.2x+6. 4. is y=2x+10

Step-by-step explanation:

Which value x makes the equation 0.75(x+20)=2+0.5(x-2)

Answers

The value of x that will make both equations to be equivalent to each other is = -56

From the equation:

0.75(x + 20) = 2 + 0.5(x - 2)

Open brackets

0.75x + 15 = 2 + 0.5x - 1

Collect like terms

0.75x - 0.5x = 2 - 1 - 15

0.25x = - 14

Divide both sides by 0.25

\mathsf{(0.25x)/(0.25) =( - 14)/(0.25)}

x = -56

Therefore, we can conclude that the value of x that will make both equations to be equivalent to each other is -56

Learn more about solving algebraic equations here:

brainly.com/question/953809?referrer=searchResults

0.75(x+20)=2+0.5(x-2)

Distribute on both sides

0.75x+15= 2+0.5x-1

Add common factors

0.75x+15=1+0.5x

Subtract 0.5x on both sides

0.25x+15=1

Subtract 15 on both sides

0.25x=-14

Divide by 0.25 on both sides

x = -56

Factor 6y 2 - 48 + 42y.

(6y + 8)(y - 6)
6(y + 8)(y - 1)
6(y - 1)(y - 7)

Answers

Answer:

6 (y + 8) (y - 1)

Step-by-step explanation:

Factor the following:

6 y^2 + 42 y - 48

Factor 6 out of 6 y^2 + 42 y - 48:

6 (y^2 + 7 y - 8)

The factors of -8 that sum to 7 are 8 and -1. So, y^2 + 7 y - 8 = (y + 8) (y - 1):

Answer: 6 (y + 8) (y - 1)

PS: it's really helpful to pose the question correctly 6 y^2 + 42 y - 48  NOT

6y 2 - 48 + 42y

Answer:

6 (y + 8) (y - 1)

Step-by-step explanation:
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