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3 years ago

7

Describe and correct the error in the solving equation

1 answer:

tester [92]3 years ago

8 0

Answer:

the error is that you have passed the negative sign alongside with the 0.8 but you have corrected by putting the -0.8 in the parentheses. if you used a computer check your answer something that could have messed up was the negative sign on the right side of the r in the part where It says r=12.6+(-0.8)

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.- Alicia tiene una finca de 1 km2 de superficie. Dedica 28 hm2 a cultivar trigo, 3.900 dam2 a plantar olivos y el resto lo ha p

SVEN [57.7K]

Answer:

330 000 m²

Step-by-step explanation:

1. Area of farm

$A = \text{1 km}^{2} \times\left (\dfrac{\text{1000 m}}{\text{1 km}} \right )^{2}= \text{1 000 000 m}^{2}$

2. Area for wheat

$A = \text{28 hm}^{2} \times \left (\dfrac{\text{100 m}}{\text{1 hm}}\right)^{2} = \text{280 000 m}^{2}$

3.Area for olive trees

$A = {\text{3900 dam}^{2} \times \left (\dfrac{\text{10 m}}{\text{1 dam}}\right )^{2}}= \text{390 000 m}^{2}$

4. Area for sunflowers

Total area = 1 000 000 m²

- Area for wheat = 280 000 m²

- Area for olive trees = <u>390 000 </u>

<u>670 000 </u>

Area for sunflowers = 330 000 m²

Sunflowers occupy 330 000 m².

4 0

3 years ago

What is y in the equation 2/3 (2y+1) = 3/7 (2-y)

Alik [6]

Answer:

$y=\frac{4}{37}$

Step-by-step explanation:

$\frac{2}{3}(2y+1)=\frac{3}{7}(2-y)$

$\frac{4}{3}y+\frac{2}{3} =\frac{6}{7}- \frac{3}{7}y$

Add $\frac{3}{7}y$ on both sides and subtract $\frac{2}{3}$ on both sides.

$(\frac{3}{7}y- \frac{2}{3})+\frac{4}{3}y+\frac{2}{3} =\frac{6}{7}- \frac{3}{7}y+(\frac{3}{7}y- \frac{2}{3})$

$\frac{3}{7}y+\frac{4}{3}y=\frac{6}{7}-\frac{2}{3}$

Solve the fractions.

$\frac{(3)(3)+(7)(4)}{(7)(3)}y=\frac{(6)(3)-(7)(2)}{(7)(3)}$

$\frac{9+28}{21} y=\frac{18-14}{21}$

$\frac{37}{21}y =\frac{4}{21}$

Multiply by the reciprocal of the fraction with the variable to isolate the variable. The reciprocal is the inverted fraction.

$\frac{21}{37}*\frac{37}{21}y =\frac{4}{21}*\frac{21}{37}$

$y=\frac{4}{37}$

4 0

4 years ago

Read 2 more answers

Find the equation of the exponential function represented by the table below:

Pepsi [2]

Answer:

y = 0.01 * 2ˣ

Step-by-step explanation:

f(x) = xⁿ

0: 0.01 = 0.01 * 2⁰ = 0.01 * 1 = 0.01

1: 0.02 = 0.01 * 2¹ = 0.01 * 2¹ = 0.02

2: 0.04 = 0.01 * 2² = 0.01 * 2² = 0.04

8 0

3 years ago

3. PLEASE ANSWER ATTACHED Parrallel lines with multiple transversals

expeople1 [14]

Answer:

Step-by-step explanation:

( 2x - 8 )° = ( x + 28 )° ⇒ x = 36

<em>m∠1</em> = <em>m∠4</em> = 180° - ( 36 + 28 )° = <em>116 </em>°

<em>m∠2</em> = 123° - 64° = <em>59</em> °

<em>m∠3</em> = <em>123 </em>°

4 0

3 years ago

The graph models A, the area in square feet of a rectangular porch with a length that is 0.56w less than

MrRissso [65]

Answer:

C.25

Step-by-step explanation:

4 0

3 years ago