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3 years ago

PLEASE HELP I WILL GIVE BRAINLIEST.....please help

Mathematics

1 answer:

docker41 [41]3 years ago

7 0

I agree I think the answer is 1715

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Could yall help me pls?

kaheart [24]

Answer:

240 cm^2

Step-by-step explanation:

area of each triangle

=(10 x 7)/2 cm^2

=35 cm^2

area of four triangles

=35 x 4 cm^2

=140 cm^2

area of the square

=10 x 10 cm^2

=100 cm^2

area of the polygon

=(100 + 140) cm^2

=240 cm^2

8 0

3 years ago

12k+5=k+49 what's the answer

dybincka [34]

The answer is k=4 you're welcome

3 0

3 years ago

What is the largest possible area (in cm²) for a rectangle with a perimeter of 120 cm?

kompoz [17]

Answer:

900 cm²

Step-by-step explanation:

Perimeter of a rectangle is given by

P=2(l+w)

Where l and w are length and width respectively.

Substituting P with 120 cm

120=2(l+w)

Divide both sides by 2

60=l+w

Making w the subject of formula

w=60-l

Area, A=lw

Substitute w with 60-l

A=l(60-l)=60l-l²

Since A=60l-l²

Get the first derivative of A with respect to l

0=60-2l

l=60/2=30

Therefore, w=60-l=60-30=30

The length abd width are both 30cm. This is a square and a square is also a type of rectangle since it has four sides.

Area=30*30=900cm²

8 0

3 years ago

A store sells two different types of coffee beans; the more expensive one sells for $8 per pound, and the cheaper one sells for

Slav-nsk [51]

So,

Let the amount of the expensive coffee beans be x, and the amount of the less expensive coffee bean be y.

The number of pounds of coffee beans is 50.
x + y = 50

$8 times the amount of more expensive coffee beans plus $4 times the amount of less expensive coffee beans divided by 50 equals $6.50.
$\frac{8x + 4y}{50} = 6.50$

Now, all we have to do is use Elimination by Substitution.
x + y = 50

Subtract y from both sides.
x = 50 - y

Substitute 50 - y for x in the second equation.
$\frac{8(50 - y) + 4y}{50} = 6.50$

Distribute.
$\frac{400 - 8y + 4y}{50} = 6.50$

Collect Like Terms.
$\frac{400 -4y}{50} = 6.50$

Simplify.
$\frac{4(100 -y)}{2*5^2} = 6.50$
$\frac{2(100 -y)}{5^2} = 6.50$
$\frac{200 - 2y}{25} = 6.50$

Multiply both sides by 25.
$200 - 2y = 162.5$

Add 2y to both sides.
$200 = 162.5 + 2y$

Subtract 162.5 from both sides.
37.5 = 2y

Divide both sides by 2.
18.75 = y

Substitute in an earlier equation to solve for x.
x = 50 - y
x = 50 - 18.75
x = 31.25

Check.
31.25 + 18.75 = 50 lbs.

$\frac{8x + 4y}{50} = 6.50$
$\frac{8(31.25) + 4(18.75)}{50} = 6.50$
$\frac{250 + 75}{50} = 6.50$
$\frac{325}{50} = 6.50$
$\frac{5^2*13}{2 * 5^2} = 6.50$
$\frac{13}{2} = 6.50$
6.50 = 6.50 This also checks.

There were 31.75 pounds of the more expensive coffee bean and 18.75 pounds of the less expensive coffee bean.

8 0

3 years ago

Y+8=4/3(x-9) into a slope intercept form

Anestetic [448]

Answer:

y=4/3x-20

Step-by-step explanation:

type this into Desmos

5 0

3 years ago