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miv72 [106K]
3 years ago
8

One positive number exceeds another by 7​, and their product is 78. Find the numbers.

Mathematics
1 answer:
Alona [7]3 years ago
3 0

Answer:

13 and 6

Step-by-step explanation:

  • 13 • 6 = 78
  • 13 – 6 = 7

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The sum of three consecutive integers is 63. What is the lowest of the three integers?
sveta [45]
  One number be x
x+(x+1)+(x+2)=63
x+x+1+x+2=63
3x+3=63
3x=63-3
3x=60
x=60:3
x=20
smallest number = x=20
middle <span>number = x+1= 20+1=21
</span>largest<span><span><span> number = x+2</span> =20+2= 22</span>
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3 0
3 years ago
The sum of the digits of a certain two-digit number is 7. Reversing its digits increases the number by 9. What is the number? wr
dimaraw [331]
Xy is the number

A) x + y = 7
B) 10y + x = 10x + y + 9
collecting terms of equation B
B) -9x + 9y = 9
multiplying A) by 9
A) 9x + 9y = 63  then adding it to equation B)
B) -9x + 9y = 9
18y = 72
y = 4
x = 3

The number is 34


4 0
3 years ago
The numbers of points scored in each basketball game are 49, 36, 61, 64, 39, 41, 43, and 39.
valentina_108 [34]

Answer:

In 25% of the games at least 55 points were scored.

Step-by-step explanation:

Percentage:

Number of desired outcomes multiplied by 100 and divided by the number of total outcomes.

In this question:

8 total games

In 2 at least 55 were scores.

100*2/8 = 100/4 = 25%

In 25% of the games at least 55 points were scored.

5 0
3 years ago
-3(5z 24) 2=2(3-2z)-4
zhenek [66]

Answer:

−

364 z + 10

Step-by-step explanation:

5 0
3 years ago
A metal bar has the D of 7.9 g/mL. If the volume of the bar is 500mL, what is the mass in kg?​
morpeh [17]

Answer:

It will be 0.5kg cuz kg and liters are same

8 0
3 years ago
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