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Sergio039 [100]
4 years ago
10

I need help on these two questions please.

Mathematics
1 answer:
kogti [31]4 years ago
6 0

Answer:

7)x=20 8)x=19

Step-by-step explanation:

7)4x-40=2x

4x-2x=40

2x=40

x=20

8)

2x+19=3x

3x-2x=19

x=19

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Subtract 7x2+4x-9 from 5x2+10x-5
swat32

Answer:

2x^2-6x-4

Step-by-step explanation:

(7x2 + 4x - 9)

-(5x2 + 10x - 5)

=

7x^2-5x^2=2x^2

4x-10x=-6x

-9-(-5)=-4

thus, your answer is 2x^2-6x-4

5 0
3 years ago
Read 2 more answers
A company makes wax candles shaped like rectangular prisms. Each candle is 5 cm long, 4 cm wide, and 15 cm tall. If the company
inessss [21]

Answer:

5100 cm of wax will make 17 candles

Step-by-step explanation:

Each candle is 5 cm long, 4 cm wide, and 15 cm tall

to know the space they cover, we divide it with their volume and since they are in rectangular prism

Volume is length x width x height

5 x 4 x 15 = 20 x 15 = 300cm

1 candle = 300cm

what number of candle is represented as x

1 candle comprises of  300cm wax

x = 5100

300x = 5100 x 1 =5100

300x= 5100

x= 5100/300 = 17

5100 cm of wax will make 17 candles

7 0
3 years ago
Read 2 more answers
Matt charges 3$ for every 15$of walking . how much will matt charge for one hour
IRINA_888 [86]
5 dollars per hour
because 15 divided by 3 is 5.
8 0
3 years ago
Read 2 more answers
△ABC is similar to △XYZ
Lelu [443]
The correct answer is  ∠Y = 75°
because

    45°∠A ∼ ∠X         
         ∠B ∼ ∠Y = 75°   
    60°∠C ∼ ∠Z    
   
  45 + 60 = 105   
  180 -105 = 75
5 0
3 years ago
Read 2 more answers
Multiply the fractions:<br> 2 / 5 ∙ 3 / 4.
Bingel [31]

Answer:

\frac{3}{10}

Step-by-step explanation:

\frac{2}{5} * \frac{3}{4} can be solved by just multiplying the numerators together and the denominators together

2 * 3 = 6 and 5 * 4 = 20 so the answer would be \frac{6}{20}

This simplifies to \frac{3}{10}

4 0
4 years ago
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