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Alisiya [41]
2 years ago
10

HELP

Mathematics
2 answers:
alina1380 [7]2 years ago
3 0

Answer:

D

Step-by-step explanation:

72+21-11=82

82-67=15

Mandarinka [93]2 years ago
3 0

Answer:

The Correct Answer is option D.

Step-by-step explanation:

Tina observed that the temperature was 72 degrees. Later the temperature rose 21 degrees and then dropped 11 degrees.

 

That is, 72+21-11=82.

 

She then flew to New York where the temperature was 67 degrees.

 

The change in temperature from when Tina left Atlanta and arrived in New York is,

82-67=15.

 

Hence, the change in temperature is 15.

 

Thus, the correct option is D.

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Answer:

y = 2

Step-by-step explanation:

The mid segment HJ is half of the third side GK , that is

HJ = \frac{1}{2} GK , substitute values

2y = \frac{1}{2} (y + 6) ← multiply both sides by 2 to clear the fraction

4y = y + 6 ( subtract y from both sides )

3y = 6 ( divide both sides by 3 )

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(x + 1) x (x - 4). When you check it you will get your original expression.
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PetSmart.com sold the following varieties of dog food in June 2003.
aivan3 [116]

Let x  be the number of bags of Nature's Recipe Venison Meal & Rice Canine 20 percent protein, y be the number of bags of Nutro Max Natural Dog Food 27 percent protein and z be the number of bags of PetSmart Premier Oven Baked Lamb 25 percent protein a dog breeder buys. He  wants to make 300 pounds of a mix. Then

20x+17.5y+30z=300.

Now

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Then 4x+4.725y+7.5z=66.

You get a system

\left\{\begin{array}{l}20x+17.5y+30z=300\\4x+4.725y+7.5z=66.\end{array}\right.

From the first equation z=10-\dfrac{2}{3}x-\dfrac{7}{12}y. Substitute it into the second equation:

4x+4.725y+7.5(10-\dfrac{2}{3}x-\dfrac{7}{12}y)=66.

Simplify it:

-x+\dfrac{7}{20}y=-9,\\ \\ 20x-7y=180.

y must be divided by 20, then

  • y=0, x=9, z=10-6=4;
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  • y=40, x=23,  z is not a whole number;
  • y=60, x=30, z=10-20-35<0;
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Answer: 9 bags with 1st mix, 0 bags with 2nd mix and 4 bags with 3rd mix.

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Answer:

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Step-by-step explanation:

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