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aivan3 [116]
3 years ago
15

If x=5 and y=−2, evaluate the following expression:10+5xy​

Mathematics
2 answers:
Makovka662 [10]3 years ago
7 0

Answer:

- 40

Step-by-step explanation:

Substitute x = 5, y = - 2 into the expression

10 + 5xy

= 10 + 5(5)(- 2)

= 10 - 50

= - 40

Fittoniya [83]3 years ago
5 0

Answer:

-90

Step-by-step explanation:

10+5×5×(-2)

10+25×(-2)

10+(-100)

10-100

-90

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The perimeter of a rectangle is 188 meters. The width is 2 meters shorter than triple the length. Find the area of the rectangle
madreJ [45]

Answer:

376

Step-by-step explanation:

188 x 2 = 376

3 0
3 years ago
Helen and Rebecca baked some muffins in the ratio 2:5. After Helen baked another 12 muffins, the ratio become 1:2. How many muff
storchak [24]
<h3>Answer:  60 muffins</h3>

=========================================================

Explanation:

x = some positive whole number

2x = amount Helen baked initially

5x = amount Rebecca baked initially

Notice that the ratio 2x:5x reduces to 2:5 after dividing both parts by x.

So (2x)/(5x) = 2/5

Helen then bakes another 12 muffins, bumping the 2x up to 2x+12. The ratio is now 1:2, which means,

(amount Helen bakes)/(amount Rebecca bakes) = 1/2

(2x+12)/(5x) = 1/2

2(2x+12) = 5x*1 .... cross multiply

4x+24 = 5x

24 = 5x-4x

24 = x

x = 24

From here, we then can say,

  • Helen = 2x+12 = 2*24+12 = 48+12 = 60
  • Rebecca = 5x = 5*24 = 120

Helen baked 60 muffins and Rebecca baked 120 muffins. We see that 60:120 reduces to 1:2 after dividing both parts by the GCF 60.

Furthermore, note how

  • 2x = 2*24 = 48
  • 5x = 5*24 = 120
  • 48:120 reduces to 2:5 after dividing both parts by 24

This helps confirm we have the correct answer.

6 0
3 years ago
Identify cosQ as a fraction and as a decimal rounded to the nearest hundredth. HELP ASAP! PLEASE!!
cluponka [151]

Answer:

Step-by-step explanation:

Cos(Q) = adjacent to Q/Hypotenuse

adjacent = 15

Hypotenuse = 17.7

Cos(Q) = 15/17.7

Cos(Q) = 0.8475

The answer is C.

D is impossible. The cos of any angle can never be more than 1.

B is  Tan(Q). They are not the same.

A is  Sin(Q)

7 0
4 years ago
Diana baked 36 cookies with 4 scoops of flour. How many scoops of flour does Diana need in order to bake 45 cookies? Assume the
max2010maxim [7]

Answer:

5 scoops of flour

Step-by-step explanation:

36 divided by 4 is 9

9 x 5 is 45

5 0
3 years ago
HELPPP PLSSSS ITS ALMOST DUE IN 1 HOUR WILL GIVE BRAINLIEST THANKS AND 5 STARSSS
svp [43]

Answer:Its been 5 hours. so 85 - 82 = X. X times 0.6 = 5 then translate to 5 hours.

Step-by-step explanation:

7 0
3 years ago
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