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butalik [34]
3 years ago
8

Hannah has a grid a squares that has 12 rows with 15 squares in each row.She colors 5 rows of 8 squares in the middle of the gri

d blue.She colors the rest of the squares red.How many squares does Hannah color red?
Mathematics
2 answers:
Alexxandr [17]3 years ago
8 0

Answer:

140

Explanation:

Each row has a total count of 15 squares

There are a total of 12 rows thus total squares is  

12

×

15

=

180

Colored blue  

→

5 rows of 8  

→

5

×

8

=

40

Rest are red: Total count - blue  

→

180

−

40

=

140

kiruha [24]3 years ago
8 0

Hannah colors 140 squares red.

12*15=180

5*8=40

180-40=

140

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Answer:

m∡A = 41.4°

m∡B = 48.6°

m∡C = 90°

a = 3\sqrt{7}

b = 9

c = 12

Step-by-step explanation:

to find the length of side 'a' I used the Pythagorean Theorem to get:

a² + 9² = 12²

a² + 81 = 144

a² = 63

a = \sqrt{63} which equals \sqrt{9}\sqrt{7} which is 3\sqrt{7}

to find m∡B I found the arcsin(B) = 9/12 to get 48.6

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Step-by-step explanation:

3 0
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wlad13 [49]

The solution to the equation x(x+4) = 6 is x = -2 + √10 or x = -2 - √10 after solving with the quadratic formula.

<h3>What is a quadratic equation?</h3>

Any equation of the form \rm ax^2+bx+c=0 where x is variable and a, b, and c are any real numbers where a ≠ 0 is called a quadratic equation.

As we know, the formula for the roots of the quadratic equation is given by:

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We have an equation:

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By distributive property:

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Thus, the solution to the equation x(x+4) = 6 is x = -2 + √10 or x = -2 - √10 after solving with the quadratic formula.

Learn more about quadratic equations here:

brainly.com/question/2263981

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