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defon
4 years ago
9

MATH HELP!!!!!!!!!!!

Mathematics
1 answer:
bekas [8.4K]4 years ago
4 0

union combines all the numbers in the sets

 q1: (5,7,10,11,13,15,17)


q2: 7x+1 =2x^2-3

this needs to be factored to find X=4


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5(x-3)+2x+21=3(x+4)+2x
nekit [7.7K]

Answer:

x = 3

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

5(x−3)+2x+21=3(x+4)+2x

(5)(x)+(5)(−3)+2x+21=(3)(x)+(3)(4)+2x(Distribute)

5x+−15+2x+21=3x+12+2x

(5x+2x)+(−15+21)=(3x+2x)+(12)(Combine Like Terms)

7x+6=5x+12

7x+6=5x+12

Step 2: Subtract 5x from both sides.

7x+6−5x=5x+12−5x

2x+6=12

Step 3: Subtract 6 from both sides.

2x+6−6=12−6

2x=6

Step 4: Divide both sides by 2.

Hope this helps!

=)

3 0
3 years ago
Amanda bought g gallons of paint for $16.55 per gallon and t pints of paint thinner for $5.97 per pint. Write an expression to r
Neporo4naja [7]

Answer:

total \ cost =16.55(8) +5.97(3)=150.31

Step-by-step explanation:

Amanda bought g gallons of paint for $16.55 per gallon and t pints of paint thinner for $5.97 per pint

Total amount = rate per gallon times gallons + rate per pint times  pints

total amount =16.55 g +5.97 t

amanda bought 8 gallons of paint and 3 pints of paint thinner

g=8 and t=3, substitute the values and find total cost

total \ cost =16.55(8) +5.97(3)=150.31

3 0
3 years ago
GEOMETRY - triangle similarity
lisabon 2012 [21]

Answer:

ΔABC ≈ ΔDEF

∡B ≅ ∡E

x = 4.5

BC is similar to EF

Step-by-step explanation:

to find 'x':

6/16 = x/12

16x = 72

x = 4.5

5 0
3 years ago
Read 2 more answers
A teacher is making multiple copies of a one page homework assignment. the time it takes her in seconds is two times the number
Verdich [7]

Answer:

It takes her 15sec

yes it dose

Step-by-step explanation:

6x2+3=15

15secs

5 0
4 years ago
Can someone please answer this question please answer it correctly and please show work please help me I need it
JulsSmile [24]

Answer:

B

Step-by-step explanation:

We'll use Natasha's location as 0 on a number line. To the left of her, 51/20 would be negative and 25/4 would be positive.

To find how far apart the dogs are, we would need to add the absolute value of each number:

|-51/20| + |25/4| however, this can also be rewritten as:

25/4 - (-51/20)

3 0
4 years ago
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