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3 years ago

A box contains 25 crayons. There are 8 red crayons and 6 yellow crayons and the rest are blue

Mathematics

1 answer:

lawyer [7]3 years ago

6 0

Answer:

0.44

Step-by-step explanation:

im pretty sure it is 0.44 because of the division.

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Using complete square to slove for x in the equation (x+7) (x-9)=25

Brrunno [24]

Answer:

$x_1=1+\sqrt{89}\\\\x_2=1-\sqrt{89}$

Step-by-step explanation:

Apply Distributive property:

$(x+7)(x-9)=25\\\\x^2-9x+7x-63=25$

Add like terms and then add 63 to both sides of the equation:

$x^2-2x-63=25\\\\x^2-2x-63+63=25+63\\\\x^2-2x=88$

Pick the coefficient of the x term, divide it by 2 and square it:

$(\frac{2}{2})^2=1$

Add it to both sides of the equation:

$x^2-2x+1=88+1$

Rewriting the left side as a squared binomial, we get:

$(x-1)^2=89$

Apply square root to both sides:

$\sqrt{(x-1)^2}=\±\sqrt{89}\\\\x-1=\±\sqrt{89}$

And finally we need to add 1 to both sides of the equation. Then we get:

$x-1+1=\±\sqrt{89}+1\\\\x=\±\sqrt{89}+1\\\\\\x_1=1+\sqrt{89}\\\\x_2=1-\sqrt{89}$

8 0

3 years ago

Ana age is 8 years less than 4 times her sisters age. Write an expression for Ana’s age. How old is ana if her sister is 5 years

DanielleElmas [232]

Answer:

Ana is 12

Step-by-step explanation:

5x4=20

20-8=12

3 0

3 years ago

Im need HELP!!!<br>m<JEF=40°

mr Goodwill [35]

Complement of JEF is 50 degrees
supplement of JEF is 140 degrees

complement of DON is -34 degrees or depending on your teacher, the answer is NONE.
supplement of DON is 56 degrees

8 0

3 years ago

Which explanation best describes the answer to this problem?

Triss [41]

Your answer is D hope this helped

3 0

3 years ago

HELP PLEASE! 30 POINTS!

OLga [1]

600,158÷153 square miles = 3922.6

8 0

2 years ago

Read 2 more answers