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Stella [2.4K]
3 years ago
14

Help solve these using the addition and multiplication properties of equality

Mathematics
1 answer:
Leno4ka [110]3 years ago
7 0

#19


-4/5x=8


-4(x)/5=8


-4x/5=8


Multiply both sides by


-4x=8(5)


-4x=40


Divide both sides by -4


X= -10


#21

-4/3x+5=7


Multiply both sides by 3


-4/3x(3)+5(3)=7(3)


-4x+15=21


-4x=21-15


-4x=6


X=6/-4


X=-3/2





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Leila works mowing lawns and babysitting. She earns $8.30 an hour for mowing and $7.30 an hour for babysitting. How much will sh
Mamont248 [21]

Answer:

$79 total earnings

Step-by-step explanation:

Here, earnings = (hourly rate)(number of hours):

                          = ($8.30/hr)(6 hrs) + ($7.30/hr)(4 hrs), or

Total earnings =  $49.80               +  $29.20

    "          "         = $79.00

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3 years ago
2. A landscaper drew a scale drawing of a rectangular yard using the scale, , before beginning to work on the yard.(a) The lands
Phantasy [73]

Complete question :

A landscaper drew a scale drawing of a rectangular yard using the scale, , before beginning to work on the yard.

(a) The landscaper plans to put a fence around the entire yard. How many meters of fencing does she need? Show your work.

(b) The landscaper plans to create a rectangular garden that is the size of the actual yard. What is the area of the garden?

Answer:

28cm ; 48cm²

Step-by-step explanation:

From the diagram :

Length = 8cm

Width = 6cm

Meters of fencing required :

Perimeter of rectangle :

P = 2(length + Width)

P = 2 (8cm + 6cm)

P= 2(14cm)

P = 28 cm

2.)

Area of rectangle :

Length * width

8cm * 6cm

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8 0
3 years ago
Write the value of the 6 in 106,534
Anastasy [175]
1 = Hundred tens of thousandths.

0 = tens of thousandths.

6 = thousandths.

5 = hundredths.

3 = tenths.

4 = units.
8 0
3 years ago
Read 2 more answers
Help<br><br><br><br><br><br> Thrhfjfhfhhfhfhfjf
12345 [234]

Answer: 5

Step-by-step explanation:

a^2 + b^2 = c^2

12^2 + x^2 = 13^2

144 + x^2 = 169

x^2 = 25

square root both sides

x = 5

to check, do 12^2 + 5^2 =169

sqrt of 169 is 13

hope this helps

4 0
3 years ago
4 (negative one-half x + 7) + 5 x = 15
Ronch [10]

Answer:

Step 3 is incorrect

Step-by-step explanation:

4(-1/2x + 7) + 5x = 15

-2x + 28 + 5x = 15

3x + 28 = 15

3x + 28 - 28 = 15 - 28

3x = -13

4 0
3 years ago
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