3 years ago

Help please, just number 3, thats all im asking, thanks.

Mathematics

1 answer:

Bezzdna [24]3 years ago

4 0

The rectangle that has area 400 has width 10, so its length is 40.

A = LW; L = A/W = 400/10 = 40

The length is 10 + 0.2 = 10.2. The width is 10 + 2 = 12

The multiplication is 10.2 * 12

40.2 * 12 = 40 * 10 + 0.2 * 10 + 40 * 2 + 0.2 * 2

40.2 * 12 = 400 + 2 + 80 + 0.4

40.2 * 12 = 482.4

You might be interested in

A small bucket holds 75% as much as a large bucket.If the small holds 36 units,how much does the large hold?

melomori [17]

Answer:

Explanation:

36÷75=

0.48

6 0

4 years ago

I really need someone to explain to me on how to solve these!! :(

HACTEHA [7]

Answer:

3.7%

Step-by-step explanation:

(p)principal=$3400

(t)time=9months=9÷12year=3÷4year

(i)interest=$94.50

(r)rate=?

we have

r%=i/(pt)

r%=94.50÷(3400×3÷4)

r÷100=94.50÷2550

r=0.37×100

r=3.7

required rate is 3/7%

5 0

3 years ago

A rectangle is 3 times as long as it is wide, and its perimeter is 80 centimeters. Find its dimensions

Free_Kalibri [48]

Say the width is W and the length is L

L=3W (and of course W=W)

Now you use the perimeter formula P=2L+2W

80=2(3W) + 2W)

80=6W+2W

80=8W Divide both sides by 8

W=10

Now that you know the width, substitute it back into L=3W to find the length

L=3(10)

L=30

The dimensions are length: 30 cm and width: 10 cm

8 0

4 years ago

The dolphin show was attended by 445 teenagers. Out of these, 136 were girls. What was the percentage of boys in the audience?

Luden [163]

Answer:

69.44%

Step-by-step explanation:

136 girls. 309 boys

309/445 = .69438

.69438 * 100 = 69.44%

3 0

3 years ago

True or False: When completing the square, the first step is to double the middle term.

andrew11 [14]

Answer:

true?

Step-by-step explanation:

6 0

3 years ago