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horrorfan [7]
2 years ago
15

HOW MANY 7 DIGIT TELEPHONE NUMBERS ARE POSSIBLE IF THE FIRST DIGIT CANNOT

Mathematics
1 answer:
lyudmila [28]2 years ago
6 0

Answer:

there are 8 million different phone numbers whose phone numbers whose digits aren't 0 or 1

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I need help please!!:)
asambeis [7]

Answer:

No bcuz its not on the line

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
find an expression for the area of a rectangle of sides 2x+3 and x-1 given that the perimeter is 28cm what is the value of x
Ierofanga [76]

Answer:

4cm

Step-by-step explanation:

Given data

L=(2x+3)

W=(x-1)

P=28cm

A= L*W

A= (2x+3)*(x-1)

open bracket

A= 2x^2-2x+3x-3

collect like terms

A= 2x^2+x-3

P= 2L+2W

P= 2*(2x+3)+2(x-1)

P= 4x+6+2x-2

collect like terms

P= 6x-4

but p= 28

28= 6x-4

28-4= 6x

24= 6x

x= 24/6

x= 4cm

Hence x= 4cm

4 0
3 years ago
Rectangle QRST is dilated by a scale factor of 1/2. What is the perimeter of rectangle Q'R'S'T'. (Please help)
natima [27]

Answer:

7

Step-by-step explanation:

take the perimeter of what you have now (14) and divide it by 2, because it is dilated by 1/2

8 0
3 years ago
A group of 52 people attend a ball game. There were three times as many men as women in the group. Write and solve a system of e
kkurt [141]

Answer:

lets call the children, c, and call adult, a,

c+a= 52       eq 1: a=52-c

c=3a            eq 2

take a's value from eq 1 and plug it into eq 2

c=3(52-c)

c=156-3c

4c=156

c=39 the number of children that attended the ball game.

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
10. A young child is 44 months old. Find the age of the baby in years as a mixed
viktelen [127]

Step-by-step explanation:

44 month old

12 months=1 year

44÷12=3 2/3

3 2/3 years

5 0
3 years ago
Read 2 more answers
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