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3 years ago

4x +5 (3x2-x) - (1+ x + 6x2) i do i solve this

Mathematics

1 answer:

gavmur [86]3 years ago

7 0

Answer: 9x^2-2x-1

Step-by-step explanation: hope this helps!

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The length,AB of the rectangular lot is 1 foot less than two times its width, BC. If the perimeter of the rectangular lot 394 fe

r-ruslan [8.4K]

Answer:

$AB=131\ ft$

Step-by-step explanation:

we know that

The perimeter of the rectangular lot is

$P=2(AB+BC)$ ----> equation A

where

AB is the length

BC is the width

we have

$AB=2BC-1$ ---> equation B

$P=394\ ft$ ----> equation C

substitute equation B and equation C in equation A

$394=2(2BC-1+BC)$

solve for BC

$394=2(3BC-1)$

$394=6BC-2$

$6BC=396$

$BC=66\ ft$

Find the value of AB

$AB=2BC-1$

$AB=2(66)-1$

$AB=131\ ft$

6 0

3 years ago

X/5=2/3=5/y 2/3 4/9 1

Mademuasel [1]

$\frac{x}{5}= \frac{2}{3} = \frac{5}{y}$
Break the equation into parts;
$\frac{x}{5} = \frac{2}{3} ; \frac{2}{3}= \frac{5}{y}$
Solving for x;
$\frac{x}{5} = \frac{2}{3}$
x= $\frac{10}{3}$
Solving for y;
$\frac{2}{3} = \frac{5}{y} 
y= \frac{3*5}{2} 
y= \frac{15}{2}$
$\frac{x}{y} = \frac{10/3}{15/2}$
$\frac{x}{y} = \frac{4}{15}$

5 0

3 years ago

Select the correct answer.

MrRissso [65]

Answer:

C. 309 cm2

Step-by-step explanation:

A=2(1+sqr2)a^2

A=2(1+sqr2)8^2

≈309.01934

3 0

2 years ago

True or false: the square root of a number is always less than that number. Select one: A. true B. false

aleksandrvk [35]

Answer:

True

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

The sum of the first 70 positive odd integers.

Leokris [45]

Answer:

The answer is 4900

Do you understand?

Step-by-step explanation:

7 0

3 years ago