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2 years ago

9×27+2×31-28=n what is the value of n

1 answer:

6 0

(9)(27)+(2)(31)−28=n

Simplify:

(9)(27)+(2)(31)−28=n

243+62+−28=n

(243+62+−28)=n(Combine Like Terms)

277=n

Flip the equation.

n=277

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How many times does 7 go into 19

Svetllana [295]

7 goes into 19 2 complete times. 7*2=14, but 7*3=21

the true answer is a decimal, one around 2.71

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3 years ago

Bill has a rectangular garden that is 3 1/2 feet by 4 1/2 feet. A bag of fertilizer covers 5 1/4 square feet. What is the minimu

sveta [45]

Answer:

Step-by-step explanation:

3.5*4.5=15.75 ft^2

15.75/5.25=3 bags

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2 years ago

(4x + 4)(ax – 1) – x2 +4

Oksana_A [137]

Answer:

b=-3

Step-by-step explanation:

If the expression simplifies to bx that means the $x^{2}$ terms and the constant terms must be cancel out.

Simplify it first.

$(4x+4)(ax-1)-x^{2} +4\\=(4ax^{2} -4x+4ax-4)-x^{2} +4\\=4ax^{2} -x^{2} -4x+4ax-4+4\\=4ax^{2} -x^{2} -4x+4ax$

We know –4 + 4 will cancel out. If we simplify this expression to only an x term, then the $x^{2}$ terms should be cancelled. Therefore, we say that 4ax^2 – x^2 = 0.

$4ax^{2} -x^{2} =0\\x^{2} (4a-1)=0\\4a-1=0\\4a=1\\a=\frac{1}{4}$

If we put a = ¼, then we can find the value of b:

$=4(\frac{1}{4} )x^{2} -x^{2} -4x+4(\frac{1}{4} )x\\=x^{2} -x^{2} -4x+x\\ (cancel out x^{2} terms)\\$

$=-3x$

$bx=-3x\\$ if the expression is equivalent to bx

Therefore, b = –3.

8 0

2 years ago

The temperature was 14`°F`. If the temperature dropped 5 degrees every hour for 4 hours, what is the temperature after the 4 hou

Nina [5.8K]

Answer:

-6F

Step-by-step explanation: It would be 5F(4hr) = 20F. So if you have 14F subtract 20F you get -6F. Hope this helped.

4 0

2 years ago

Find the unknown sizes of angle in the following figures

nadezda [96]

Answer:

each missing angle is 120°

Step-by-step explanation:

What you have is a kite so the two missing angles are equal.

The sum of all four angles = 360°

2y = 360° - 88° - 32° = 240°

y = 120°

6 0

3 years ago