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slavikrds [6]
3 years ago
14

I do not understand numbers 3 and 4

Mathematics
1 answer:
Margaret [11]3 years ago
8 0
3. jenny has 21 years old

and matthew  is 42


4.juan has 48 years oldand his  sister has 40
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PLZ HELP I NEED THISS
Nikolay [14]

Answer:

Step-by-step explanation:

1) 5

2) -3, which becomes 3

3) it would land at either 3, or -3

4) 7 or -7

5) if it is to the left, that means it is negative. there fore, your answer is -4

6 0
2 years ago
Math - Ratios
Llana [10]
The answer is 9 : 5
36:20
18:10
9:5
8 0
3 years ago
the store is 5/6 mile from yuri's house. the bank is 2/5 the distance from yuri's house to the store, how many miles is the bank
ladessa [460]
Distance of bank from yuri's house=(5/6)*(2/5)=2/6=1/3 mile
6 0
3 years ago
Read 2 more answers
Solve this equation by completing the square: x2 + 4x – 13 = –8
marishachu [46]

Answer:

x = 1 or x = -5

Step-by-step explanation:

We are given;

  • The quadratic equation, x² + 4x - 13 = -8

We are required to solve the equation using the completing square method.

To do this, we use the following steps;

Step 1: We make sure the coefficient of x² is one

x² + 4x - 13 = -8

Step 2: Combine the like terms (take the constant term to the other side)

x² + 4x - 13 = -8

x² + 4x = -8 + 13

we get

x² + 4x  = 5

Step 3: We add the square of half the coefficient of x on both sides of the equation

Coefficient of x = 4

Half of coefficient of x = 2

Square of half the coefficient of x = 2² (4)

We get;

x² + 4x + (2²)  = 5 + (2²)

Step 4: Put x and 2 under one square and the solve the other side of the equation.

We get

(x + 2)² = 5 + 4

(x + 2)² = 9

Step 5: Get the square root on both sides of the equation;

(x + 2)² = 9

√(x + 2)² = ±√9

(x + 2)= ±3

Therefore;

x+2 = + 3 or x + 2 = -3

Thus, x = 1 or -5

The solution of the equation is x = 1 or x = -5

6 0
3 years ago
Rocco has a weekly reading schedule, reading for 4.5 hours per day on some days and 3.5 hours per day on the other days. He read
AleksAgata [21]

Answer:

x = days he reads for 4.5 hours = 1 day

y = days he reads for 3.5 hours = 6 days

Step-by-step explanation:

Let

x = days he reads for 4.5 hours

y = days he reads for 3.5 hours

x + y = 7 (1)

4.5x + 3.5y = 25.5 (2)

From (1)

x = 7 - y

Substitute x = 7 - y into (2)

4.5x + 3.5y = 25.5 (2)

4.5(7 - y) + 3.5y = 25.5

31.5 - 4.5y + 3.5y = 25.5

- 4.5y + 3.5y = 25.5 - 31.5

-y = -6

y = 6

Substitute y = 6 into (1)

x + y = 7 (1)

x + 6 = 7

x = 7 - 6

x = 1

x = days he reads for 4.5 hours = 1 day

y = days he reads for 3.5 hours = 6 days

4 0
3 years ago
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