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e-lub [12.9K]
2 years ago
11

The temperature of a substance is -29.9 F. The temperature decreases by 8.7 and then again by 17.8"

Mathematics
1 answer:
earnstyle [38]2 years ago
6 0

Answer:

3.4

Step-by-step explanation:

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Two skiers are 30 kilometers apart and head towards each other. They meet in 2 hours. If the second skier is 5 kilometers per ho
DENIUS [597]

Answer:

Speed of first skier = 5 km/h

Speed of second skier = 10 km/h

Step-by-step explanation:

Given:

Distance between skiers = 30 km

Time after which they meet = 2 hours

Second skier is 5 km/h faster than the first skier.

To find speed of each skier.

Solution:

Let the speed of first skier be in km/h =x

<em>Distance covered in km 2 hours will be = Speed\times time=x\times 2=2x\ km</em>

Speed of second skier in km/h can be given as = x+5

<em>Distance traveled by second skier after 2 hours will be = Speed\times time=(x+5)\times 2=(2x+10)\ km   [Using distribution]</em>

Since, the skiers were 30 km apart initially, so the total distance covered by both of them when they meet after 2 hours will be = 30 km

Thus, we have:

2x+2x+10=30

Solving for x

4x+10=30

Subtracting both sides by 10.

4x+10-10=30-10

4x=20

Dividing both sides by 4.

\frac{4x}{4}=\frac{20}{4}

x=5

Speed of first skier = 5 km/h

Speed of second skier = 5+5 = 10 km/h

8 0
3 years ago
A researcher posts an online advertisement offering $25 in exchange for participation in a short study. The researcher accepts t
valina [46]

Answer:

A

Step-by-step explanation:

The study only consisted of 10 people. 10 people are not enough to come to a concrete conclusion for a project. Hope this helps!!

8 0
3 years ago
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X/5 + 3 = 9 <br> solve equation
Delicious77 [7]

Answer:

X= 15

Step-by-step explanation:

multiply 5 on x/5 and 9

divide 3 and 45

x=15

3 0
3 years ago
BRAINLIEST FOR FIRST ANSWER!!!! The right rectangular prism will be sliced parallel to its base along the dashed line.
stepan [7]
Rectangle and the area is 8 
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3 years ago
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Line CD contains points A (4, 6) and B (−2, 6). The slope of line CD is (4 points)
lbvjy [14]

Answer:

0

Step-by-step explanation:

To find the slope, we use the formula

m= (y2-y1)/(x2-x1)

   = (6-6)/(-2-4)

   = 0/-6

   =0

8 0
3 years ago
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