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1 year ago

You had $21 to spend on eight notebooks. After buying them you had $5. How much did each notebook cost?

Mathematics

2 answers:

sammy [17]1 year ago

8 0

Answer:

each notebook costs $2

Step-by-step explanation:

21-5=16/8=$2

Mkey [24]1 year ago

5 0

Each notebook cost $2

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Hello please help help

irinina [24]

9514 1404 393

Answer:

48°

Step-by-step explanation:

ΔACB is isosceles, so angles A and B have the same measure. The measure of angle C in that triangle is ...

∠C = 180° -2(69°) = 42°

Angle C in ΔCDE has the same measure. Angle D is the complement of that:

∠D = 90° -42° = 48°

_____

The relations we used are ...

the sum of angles in a triangle is 180°
base angles of an isosceles triangle are congruent
vertical angles are congruent
acute angles in a right triangle are complementary

5 0

2 years ago

What is the difference between the absolute value 4 and the absolute value of -3

LUCKY_DIMON [66]

Answer:

Step-by-step explanation:

The absolute value of -3 is 3, so 4-3=1

4 0

3 years ago

When five times a number is decreased by 8, the result is 7. What is the number? The number is

kumpel [21]

Answer:

Step-by-step explanation:

5x - 8 = 7

5x = 7+8

5x = 15

x = 15 ÷ 5

x = 3

6 0

2 years ago

20 POINTS ANSWER ASAP SHOW ALL WORK

nadezda [96]

Answer: 12,8 approximately 13 cones

Step-by-step explanation:

1] volume of a cone

V=1/3πr^2h

V=1/3π(3)^2(5)

V=47,12 cubic inches

2] volume of a cylinder

V=πr^2h

V=π(8)^2(3)

V=603.19

Now devide the volume of a cylinder by the volume of a cone

603,19÷47,12=12,8 cones

3 0

3 years ago

Help me plz

irakobra [83]

Answer:

I could do 1 and 3

1) 2x-3y=-2 ....1

2x+y=14......2

=-4y=-16

y=4

Substitute (y=4) into equation 1

2x-3 (4)=-2

2x-12=-2

2x=-2+12

2x=10

×=5

3) 5x+5y=20....1

-3x+5y=4......2

=8x=16

x=2

Substitute (x=2) into equation 1

5 (2)+5y=20

10+5y=20

5y=20-10

5y=10

y=2

5 0

3 years ago

Read 2 more answers