MATHEMATICS MIDDLE SCHOOL

(x-3).(2y+1)=13 rezolv please!

Answers

Answer 1

Answer:

Good morning

(x-3)(2y+1)=13

Now let's start by adding 3 to both sides

2xy+x-6y-3+3=13+3

2xy+x-6y=16

Now we need to add 6y to both sides

2xy+x=6y+16

Now let's factor out the variable x

x(2y+1)=6y+16

Now we gonna have to divide both sides by 2x+1 so we can find the value for x

x(2y+1)/2y+1= 6y+16/2y+1

x= 6y+16/2y+1

I hope that's help :)

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What is blank times blank equals 49

Answers

seven times seven ( 7 x 7 )

it would be 7 x7 to equal 49

Is the ratio 4.2:1.5 proportional to the ratio 12.6:4.5? Explain.PLEASE HELP I SUCK AT MATH!!!!

Answers

Yes, the two ratios are proportional to each other. The multiplier from the first ratio to the second ratio is 3. For example, 4.2 x 3 = 12.6 and 1.5 x 3 = 4.5. Basically, to figure out if two ratios are proportional to each other, just divide the smaller number into the bigger number for both corresponding numbers. If they're the same ---> Proportional. If they're not the same ---> Not Proportional

yes it is proportional because the ratios are related in the physics.

THE SEAT OF A BENCH IS IN THE SHAPE OF A TRAPEZOID WITH BASES OF 6 FEET AND 5 FEET AND A HEIGHT OF 1.5 FEET. WHAT IS THE AREA OF THE SEAT

Answers

Answer:

Area of the seat = 8.25 square feet

Step-by-step explanation:

The shape of the Seat of a bench is given to be in a trapezoid.

So, in order to find the area of the seat, we apply the formula to find the area of the trapezoid.

Now, length of the parallel sides : a = 6 feet and b = 5 feet.

Height = 1.5 feet

$\text{Area of the trapezium = }(1)/(2)(a+b)* height\n\n\implies \text{Area of the seat = }(1)/(2)(5+6)* 1.5\n\n\implies Area = (1)/(2)* 11 * 1.5\n\n\implies Area = 8.25\text{ square feet}$

Hence, Area of the seat = 8.25 square feet

Your formula for the area of a trapezoid is A=1/2 (base 1 + base 2) h
so, when you plug' n' chug your equation will look like this:
A= 1/2 (6 + 5) 1.5
= 1/2 (11) 1.5 (You can actually divide by 2 instead of multiplying by 1/2)
= 8.25 ft.^2
there you go.:)

How coral polyps form a reef

Answers

Coral reefs begin to form when free-swimming coral larvae attach to submerged rocks or other hard surfaces along the edges of islands or continents. As the corals grow and expand, reefs take on one of three major characteristic structures —fringing, barrier or atoll.

Mikaela is competing in a race in which she both runs and rides a bicycle. She runs 5 kilometers in 0.5 hour and rides her bicycle 20 kilometers in 0.8 hour

Answers

she can run 1 kilometer per hour
she can bike 22 kilometers per hour
hope i helped:)

What is the number 2,305,012 written in expanded notation?

Answers

The expanded form of that number is 2,000,000 + 300,000 + 5,000 + 10 + 2.

2,000,000 + 300,000 + 5,000 + 10 + 2 = 2,305,012

I hope that this helped you :3

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