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Goshia [24]
3 years ago
11

8.

Mathematics
1 answer:
Anni [7]3 years ago
6 0

i think the question is not correct write it again or attach the pic ic

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Please help being timed!!! Given: △ABC AB=BC=AC Area of △ABC= 25 3 4 cm2 Find: The perimeter
nirvana33 [79]

Answer:

15 cm

Step-by-step explanation:

The area of an equilateral triangle is:

\frac{\sqrt{3} }{4}a^2, where a is the length of one side.

We can find the value of a (the length) by:

\frac{25\sqrt{3} }{4} = \frac{\sqrt{3} }{4}a^2

a^2 = 25

a = 5, so the side length of this triangle is 5 cm.

The perimeter of an equilateral triangle will be 3 times the length.

3\cdot5=15

Hope this helped!

7 0
3 years ago
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Find 5 rational numbers between 6/8 and 7/2
stepan [7]

Answer:

uh cuzxbjcxlkz

Step-by-step explanation:

In a plain, robust, conversational style, the author known as “Elena Ferrante” has captivated readers worldwide with her chronicle of a complicated friendship between two women.

6 0
2 years ago
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3. Mrs. Bond wants to put 40 cups of cider into one-quart containers. How many one-quart containers does she need?​
KiRa [710]

Answer:

10

Step-by-step explanation:

3 0
3 years ago
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If 2x• 3x +(2•3 )x +6x= 648, find x.
klasskru [66]

Answer:

x = -1 ± √109

Step-by-step explanation:

2x • 3x + (2 • 3)x + 6x = 648

According to PEMDAS (parentheses/exponents | multiplication/division | addition/subtraction), we should solve the parentheses first.

(2 • 3) = 6

Now we have:

2x • 3x + (6)x + 6x = 648

Now let's multiply.

2x • 3x = 6x²

6 • x = 6x

Now we have.

6x² + 6x + 6x = 648

Combine like terms.

6x² + 12x = 648

Let's factor out a 6.

6(x² + 2x) = 648

Divide both sides by 6.

x² + 2x = 108

Let's use completing the square.

Our equation is in a² + bx = c form.

Divide b by 2.

2/2 = 1

Then square it.

1² = 1

Add 1 to both sides.

x² + 2x + 1 = 108 + 1

Simplify.

x² + 2x + 1 = 109

Now we want to factor the left side. A shortcut is just to use b/2.

(x + 1)² = 109

Take the square root of both sides.

x + 1 = ±√109

The square root is as simplified as possible.

Subtract 1 from both sides.

x = -1 ± √109

Hope this helps!

4 0
3 years ago
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The Hu family goes out for lunch, and the price of the meal is $43. The sales tax on the meal is 7%, and the family also leaves
bija089 [108]
The total cost of the meal is $52.46
4 0
3 years ago
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