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3 years ago

What is the first step to solving this equation? 4y – 10 = -3

Mathematics

2 answers:

Montano1993 [528]3 years ago

6 0

Add 10 to both sides of the equation

Dmitry [639]3 years ago

4 0

I would say either analyze it or move the 10 to the other side and change the sign. (4y=-3+10)

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Does dose anyone know how to solve this?

solniwko [45]

Answer:

Width of rectangle = 6 m

Length of rectangle = 11 m

Step-by-step explanation:

Let width of rectangle = w

Length of rectangle = 3w-7

Area of rectangle = 66 m²

We need to find length and width of rectangle

The formula used is: $Area=Length \times Width$

Putting values and finding w

$Area=Length \times Width\\66=(3w-7)(w)\\66=3w^2-7w\\3w^2-7w-66=0\\$

Solve using quadratic formula: $w=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

We have a=3, b=-7, c=-66

Putting values and finding w

$w=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\w=\frac{-(-7)\pm\sqrt{(7)^2-4(3)(-66)}}{2(3)}\\w=\frac{7\pm\sqrt{49+792}}{6}\\w=\frac{7\pm\sqrt{841}}{6}\\w=\frac{7\pm29}{6}\\w=\frac{7+29}{6}\:,\:w=\frac{7-29}{6}\\w=6, w=-3.6$

We get values of w as w=6 and w=-3.6

As we know width cannot be negative, so considering w = 6

So, Width = 6

Length = 3w-7 = 3(6)-7 = 18-7 = 11

So, Width of rectangle = 6 m

Length of rectangle = 11 m

6 0

3 years ago

Alsion saves $29.26 each month. How many months will it take her to save enough money to buy a stereo for $339.12?

Darya [45]

Answer: 12 months (1 year)

We know that Alision gains $29.26 each month. She wants to buy a stereo for $339.12

You want to divide $339.12 with $29.26 to find the total months.

339.12 / 29.26 = 11.6

CHECK:

You want to round up, since she needs the money to buy a stereo. She's allowed to have more money.

29.26 * 12 = 351.12

It will take Alision 12 months (1 year) to buy her stereo.

5 0

3 years ago

Sonya can walk 6 kilometers in 3 hours. If she has to walk 10 kilometers how much time will it take her?

kupik [55]

$6\ km\ in\ 3\ hours\\\\
10\ km\ in\ x\ hours\\\\
proportion:\\
6-3\\
10-x\\\\
cross\ multiplication\\\\
6x=3*10\\\\
6x=30\ \ \ | divide\ by\ 6\\\\
x=5\\\\ It\ will \ take\ 5\ hours.$

5 0

3 years ago

Whats the unit rate of 4 and 3/4

Vika [28.1K]

Answer:

3/16

Step-by-step explanation:

3 0

3 years ago

Anybody have an answer?

OleMash [197]

I think the answer is 18

5 0

3 years ago