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mario62 [17]
3 years ago
14

In the system –12c + 3d = 6 and –3c + 6d = –9, which expression could you use for substitution?

Mathematics
1 answer:
Jlenok [28]3 years ago
5 0
3d is the answer if I am wrong please let me know

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Age If you add Natalie's age and Fred's age, the result is 40. If you add Fred's age to 4 times
jolli1 [7]

Answer:

Fred is 28 yrs old. Nathalie is 12yrs old

Step-by-step explanation:

Let Nathalie's age be x

Let Fred's age be a

x+a=40 yrs•••••1

4x+a=76yrs•••••2

a=40-x

Substitute a for 40-x in equation (2)

4x+40-x=76

3x=76-40

3x=36

x=12

a=40-12

a=28

5 0
2 years ago
A company makes two models of television.
VLD [36.1K]

Answer:

16/25

Step-by-step explanation:

length of screen B=44*(5/4)=55cm

and its width=32*(5/4)=40cm

so, screen B had dimensions 55cm by 40 cm

screen A area=44*32 cm sqr

screen B area=55*40 cm sqr

so, model A screen area/model B screen area

=(44*32)/(55*40)

=16/25

5 0
3 years ago
Randy is painting part of a wall, excluding the two corners shown in white. a gallon of white paint will cover 100 sqaure feet.
uysha [10]

Randy needs to purchase 1.49 Gallons of paint to cover 100 sq. feet wall.

What is the area of rectangle?

The area of a rectangle is the product of its length and width. That is,       A = l x w where l is the length and w is the width of the rectangle.

Here, Required Paint = 20 X \frac{37}{4} - 2 X \frac{1}{2}X6 X 6\\

                                   = 5 X 37  - 36

                                   = 185 - 36

                                   = 149

                                   = 1.49 gallons

Thus, Randy needs to purchase 1.49 Gallons of paint to cover 100 sq. feet wall.

Learn more about Area of Rectangle from :

brainly.com/question/20693059

#SPJ1

4 0
2 years ago
What is the value of q in the equation 5q − 10 = 75?
Kamila [148]

Answer:

should be 17

Step-by-step explanation:

5 0
2 years ago
1. The temperature in Chicago is 10°F. The temperature drops 15°F overnight. What is the temperature in the morning? SIN​
Damm [24]

Answer:

-5

Step-by-step explanation:

10 minutes 15 equals -5

5 0
3 years ago
Read 2 more answers
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