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2 years ago

Measurement maths!! If good with area please help

Mathematics

1 answer:

Gennadij [26K]2 years ago

4 0

Answer:

a. 15/2 or 7.5 sqcm

b. 20 sqcm

Step-by-step explanation:

Area of a triangle is (base × height)/2.

A = (5×3)/2

A = 15/2 = 7.5cm^2

The area of a parallelogram is just base × height, but yoy have to choose wisely what is the base and height. These two measurements must be perpendicular. So the 4 and 5 are perpendicular. We won't use the measurement 6cm at all.

Area = 4×5

Area = 20 sqcm

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Bryce wrote a six-page essay for his English class. It took him 2.5 hours to write the essay. How many minutes did he average pe

erastovalidia [21]

The average per page will be given by:
(number of pages)/(time)
number of pages=6 pages
time=2.5 hours
thus
average=(6/2.5)=2.4 pages per hour
The answer is: 2.4 pages per hour

7 0

3 years ago

write the ratio as a fraction in simplest form. with whole numbers in the numerato and denominator. 40g : 64g

babunello [35]

Answer:

$\frac{5g}{8g}$ OR 5g : 8g

Step-by-step explanation:

Also a ratio can also be represented by a fraction; $\frac{40g}{64g}$

So to make the ratio to the simplest form we have to divide by a number that can divide both number.

40g : 64g

We can start dividing by 2 which will give us;

20g : 32g

$\frac{20g}{32g}$

Now we can divide by 2 again since it can divide both numbers which will give us;

10g : 16g

$\frac{10g}{16g}$

We can still divide by 2 since it can divide both numbers which will give us;

5g : 8g

$\frac{5g}{8g}$

Since no numbers can divide 5 and 8 equally that is our answer.

Also, $\frac{5g}{8g}$

8 0

3 years ago

I don’t know how to do this one. could someone help

DedPeter [7]

Answer:

If it is being dilated from (0,0) the answer is below.

Step-by-step explanation:

It depends on where it is scaled from. If you choose a point directly to that points left it will be pushed tot he right, and vice versa if it is on its right. Same for above and below

I am going to assume we are dilating from (0,0), but again, if there is another part of the question saying where it's from use this method for that as well.

So, from (0,0) the initial point is (-3, 11) Scaling by a factor of 3 means it gets pushes AWAY so it is 3 times as far away. (If it were a fraction or decimal it would be getting pulled closer)

Using (0,0) as the dilation point is the easiest because we just have to ask how far are the x and y coordinates away from (0,0) and any number is THAT number away from 0.

We break this into the two coordinates too. so how far is -3 from 0? -3. so we want a point 3 times as far away, so what is that? -9. Same for 11, 11 is 11 away from 0 so we want it 3 times as far, which is 33.

Now that we have the two coordinates that is the answer.

(-9, 33)

6 0

3 years ago

Pentagon ABCDE is graphed with the following vertices A(4,6), B(9,6), C(7,1), D(4,0), and E(1,3). What would point C' be after a

Artist 52 [7]

Answer:

(-7,1)

Step-by-step explanation:

over the y axis means the opposite way to the right or the left . the 7 will become -7 because on the other side the x-axis is made of negative numbers.

remember this to graph a number , it is like going in an elevator you have yo get in then go up or down.

7 0

3 years ago

Y = x² + 7x - 5 Can be written in the form y = ( x + a )² + b. Find the value of a and the value of b.

Mamont248 [21]

Answer:

$a=\dfrac{7}{2} \\\\b=\dfrac{49}{4} \\$

Step-by-step explanation:

$y=x^2+7x-5\\\\=x^2+2*\dfrac{7}{2}*x +\dfrac{49}{4} -\dfrac{49}{4} -\dfrac{20}{4} \\\\=(x+\dfrac{7}{2} )^2+\dfrac{69}{4} \\\\a=\dfrac{7}{2} \\\\b=\dfrac{49}{4} \\$

8 0

2 years ago