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2 years ago

Find the area 7cm 12cm 9cm

Mathematics

1 answer:

Allisa [31]2 years ago

4 0

Answer:

139.5 cm²

Step-by-step explanation:

12 · 9

108 cm²

7 · 9

63 ÷ 2

31.5 cm²

108 cm² + 31.5 cm²

139.5 cm²

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Which numbers are perfect squares? Check all that apply.

Andrew [12]

A perfect square is a number made by squaring a whole number.

Since

$1^2=1;$
$4^2=16;$
$10^2=100,$

numbers 1, 16, 100 are perfect squares. You cannot find such whole number n, that

$2=n^2;$
$18=n^2;$
$32=n^2;$
$44=n^2;$
$94=n^2,$

therefore, numbers 2, 18, 32, 44, 94 are not perfect squares.

Answer: 1, 16, 100.

4 0

3 years ago

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Solve for x: 3-x = 3(6x-9). Describe the process used to solve the equation and show each step.

FromTheMoon [43]

Answer:

$x=1.578$

Step-by-step explanation:

Given equation is $3-x = 3(6x-9)$

We need to find the value of $x$

$3-x = 3(6x-9)$

Distribute $3$ in the right-hand side

$3-x=18x-27$

Add both sides $x$

$3-x+x=18x+x-27\\3=19x-27$

Now, add both sides $27$

$3+27=19x-27+27\\30=19x$

Divide both sides by $19$

$\frac{30}{19}=\frac{19x}{19}\\x=1.578$

So, $x=1.578$

5 0

2 years ago

Which method can you use to prove that the triangles are congruent

antoniya [11.8K]

Answer:

ΔASA ≅ ΔASA

Step-by-step explanation:

4 0

3 years ago

There are 132 people seated in the school auditorium for an assembly. There are 6 rows in the auditorium, each with the same nu

Damm [24]

You do 132 ÷ 6 which is 22, so that is the answer. This is because if you the auditorium is filled, then there are a total of 132 seats. If there are 6 rows, then there have to be 22 seats each row to make 132 seats. I hope this helps!

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3 years ago

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Eddie's fishing. He has 1 1/4 ounces of weights on his line, but his bait isn't getting to the bottom of the lake. Eddie add ano

mario62 [17]

The initial weight is given by:
$1 \frac{1}{4} = 1.25
$
Then, we add a second weight:
$\frac{1}{2} = 0.5
$
Finally, we add a third weight:
$\frac{3}{4} = 0.75
$
Adding the three added weights, we can find the total weight.
We have then:
$1.25 + 0.5 + 0.75 = 2.5
$
The total weight is:
$2.5 = 2 \frac{1}{2} 
$
Answer:
eddie now has $2 \frac{1}{2}$ ounces on his line

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2 years ago

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