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Ostrovityanka [42]
3 years ago
7

A rectangle is 2 times as long as it is wide. if the area is 18 square feet, find its perimeter.

Mathematics
1 answer:
Bogdan [553]3 years ago
8 0
The perimeter would also be 18 square feet
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I need help can you help me???
Gnom [1K]

Answer:

1. about 7.87 feet away

2. About 8.37 yds

Step-by-step explanation:

1. a^2+b^2=c^2

so 25+37= C^2

= 62

Square root of 62 = 7.87400787401

(About 7.87 ft away)

2. 40+30 = C^2

Square root of 70 =  8.36660026534

About 8.37

3 0
2 years ago
Read 2 more answers
What is the solution to the equation below? round your answer to two decimal places. 3•7^x=10.48
Viefleur [7K]

Answer:

0.64

Step-by-step explanation:

3 0
2 years ago
The height of the sail on a boat is 7 feet less than 3 times the length of its base. If the
xxTIMURxx [149]

Answer:

Base=8 feet

Height=17 feet

Step-by-step explanation:

Let

Base=x

Height=3x-7

Area=68 square feet

Area of the sail boat=1/2 * base * height

68 = 1/2 * x * (3x-7)

Cross product

68 * 2 =(1) * (x) * (3x-7)

136 = 3x^2 - 7x

3x^2 - 7x - 136=0

Using quadratic formula

x= -b +or- √b^2 - 4ac / 2a

= -(-7) +or- √(-7)^2 - (4)(3)(-136) / 2(3)

= 7 +or- √49 - (-1632) / 6

= 7 +or- √49+1632) / 6

= 7 +or- √1681 / 6

=7 +or- 41 /6

x= 7+41 / 6 or 7-41 / 6

=48/6 or -34/6

=8 or -17/3

Answer:

Step-by-step explanation:

Let

Base=x

Height=3x-7

Area=68 square feet

Area of the sail boat=1/2 * base * height

68 = 1/2 * x * (3x-7)

Cross product

68 * 2 =(1) * (x) * (3x-7)

136 = 3x^2 - 7x

3x^2 - 7x - 136=0

Base of the boat can't be a negative value

Therefore,

Base = x = 8 feet

Height= 3x-7

=3(8)-7

=24-7

=17 feet

3 0
2 years ago
Please help 10 points and I will be ur friend I need help with Geometry bad
sineoko [7]
Ok, let's use N and N'.
N is (-1,-1). N' is (4,6).
From point N, the quadrilateral moves to the right 5 and up 7.
So, N+(5,7)=N'.
3 0
2 years ago
If we get the 100 from number 1 each year for ten years and invest each payment in an account that earns 8% how much will be the
blsea [12.9K]

Answer:

$1,448.66

Step-by-step explanation:

The future value of an annuity with yearly deposits 'P' at an interest rate of 'r' invested for 'n' years is determined by:

FV = P[\frac{(1+r)^n-1}{r}]

For P = $100, r = 0.08 and n = 10 years:

FV = 100[\frac{(1+0.08)^{10}-1}{0.08}]\\FV=\$1,448.66

The amount at the end of the ten years is $1,448.66

4 0
3 years ago
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