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3 years ago

1 point

Mathematics

1 answer:

Margarita [4]3 years ago

4 0

Answer:

35% or 0.35

Step-by-step explanation

If 20 grams is 100%, that means each gram is 5% of the whole. So 7 time 5 is 35.

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Graph the direct variation y=−1.5x. Using the graph, find the value of y corresponding to the value of x equal to 1; 0; 2; 3.

Y_Kistochka [10]

X=1
y=-1.5(1)
y=-1.5
(1,-1.5)

x=0
y=-1.5(0)
y=0
(0,0)

x=2
y=-1.5(2)
y=-3
(2,-3)

x=3
y=-1.5(3)
y=-4.5
(3,-4.5)

all you do is substitute the x value in the equation to get y

6 0

2 years ago

Find the length of side x in simplest radical form with a rational denominator.

SSSSS [86.1K]

Answer:

2 $\sqrt{5}$

Step-by-step explanation:

this is a 30-60-90 Δ and the ratio of the sides are 1 : $\sqrt{3}$ : 2

1 / 2 = $\sqrt{5}$ / x

cross-multiply: x = 2 $\sqrt{5}$

3 0

2 years ago

Kiran's mother gets a restaurant bill for $25. She has a coupon for 15% off. After the

PtichkaEL [24]

Answer:

$25.50

Step-by-step explanation:

So we have a 15% off coupon. We can multiply 25×.85 to find our new price.

Our total is now $21.25

Now to find the tip do $21.25 +(.2 × 21.25)

*The .2 is 20 percent of our discount price.*

We then get $25.50

8 0

3 years ago

Determine the average speed of the current in a river if a boat moves at 20 miles/hour in still water and takes 3 hours to trave

Taya2010 [7]

The speed of the current in a river is 6 miles per hour

Solution:

Given that,

Speed of boat in still water = 20 miles per hour

Time taken = 3 hours

Distance downstream = 78 miles

To find: Speed of current

If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then:

Speed downstream = (u + v) km/hr

Speed upstream = (u - v) km/hr

Therefore, speed downstream is given as:

$\text{ speed downstream } = \frac{distance}{time} = \frac{78}{3}\\\\\text{ speed downstream } = 26 \text{ miles per hour }$

We know that,

Speed downstream = (u + v)

26 = 20 + v

v = 26 - 20

v = 6 miles per hour

Thus speed of the current in a river is 6 miles per hour

3 0

3 years ago

Maple grove wants to include two types of maple trees, the namesake of the city, for their parks. Two varieties of maple trees h

klasskru [66]

75x+90y<=70,000 x<=y

5 0

3 years ago

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