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2 years ago

What two numbers multiply to 4 and add up to -21?

Mathematics

2 answers:

Mariana [72]2 years ago

7 0

5.25 might be the answer if you multiply

earnstyle [38]2 years ago

6 0

Answer:

-5.25? Maybe

-5.25 x 4 is -21

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6 children need to share 5 breakfast bars Divide bars into correct numbers of equal parts then tell the fraction each kid will g

tigry1 [53]

-- Carefully cut <em>each bar into 6 equal pieces</em>.
   There are (5 x 6) = 30 pieces all together.
   Each piece is 1/6 of a bar.

-- Each child gets 5 of the pieces.
   That's the same as <em>5/6 of a whole bar</em>.
   (6 children) x (5 pieces) = 30 pieces. It works out. yay !

5 0

3 years ago

In an endurance race, Rachel ran

Reil [10]

Answer:

$31\frac{1}{5}\ miles$

Step-by-step explanation:

we know that

The speed is equal to divide the distance by the time

The distance is equal to multiply the speed by the time

we have

$speed=9\frac{3}{5}\ \frac{miles}{hour}$

$time=3\frac{1}{4}\ hours$

$distance=(9\frac{3}{5})(3\frac{1}{4})$

Convert mixed number to an improper fraction

$9\frac{3}{5}=9+\frac{3}{5}=\frac{9*5+3}{5}=\frac{48}{5}$

$3\frac{1}{4}=3+\frac{1}{4}=\frac{3*4+1}{4}=\frac{13}{4}$

substitute

$distance=(\frac{48}{5})(\frac{13}{4})=\frac{624}{20}=31,2\ miles$

Convert to mixed number

$31.2\ mi=31+0.2=31+\frac{1}{5}=31\frac{1}{5}\ miles$

3 0

2 years ago

Please solve with explanation (high points)

IgorLugansk [536]

So, we know that:

$A=\dfrac{1}{2}ab\\P=a+b+c\\a^2+b^2=c^2$

We also know that $(a+b)^2=a^2+2ab+b^2$ . We will use that fact to find $c$ in terms of $A$ and $P$ .

$A=\dfrac{1}{2}ab\Rightarrow 2ab=4A\\P=a+b+c\Rightarrow a+b=P-c$

Therefore:

$(P-c)^2=c^2+4A\\P^2-2cP+c^2=c^2+4a\\2cP=P^2-4A\\c=\dfrac{P^2-4A}{2P}$

7 0

1 year ago

Can someone answer this asap?

IgorLugansk [536]

Answer:

145

Step-by-step explanation:

six can go into eight once with a remainder of two, next you bring down the seven and you will get twenty seven, six can go into twenty seven four times six by four is 24,27 take away 24 is 3 then you bring down the one, six can go into 31 five times, six by five is 30, 31 take away 30 is one

5 0

2 years ago

If Y is the midpoint of AB, find B given A(3,5) and Y(-2, 3).*

Murljashka [212]

Answer: (-7,1)

Step-by-step explanation:

6 0

2 years ago