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guapka [62]
3 years ago
13

Math 7 Grade 7

Mathematics
2 answers:
OleMash [197]3 years ago
8 0
The conclusion is valid
it is a systematic random sample
and the second one is a line graph (I think)
Ostrovityanka [42]3 years ago
3 0
The conclusion is a valid conclusion
it's a systematic random sample
the second one is a line graph
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Solve: 3 + √x+2 = 11<br><br> 62<br> 64<br> ()
klemol [59]

Answer: its 62

Step-by-step explanation:

Isolate the radical, then raise each side of the equation to the power of its index.

3 0
3 years ago
Solve the equation 4(3y-1)-3(2y)=6​
olga nikolaevna [1]

Answer:

4(3y - 1) - 3(2y) = 6

Remove backets

12y - 4 - 6y = 6

Group and Evaluate like terms

12y - 6y = 6 + 4

6y = 10

y = 10 \div 6

y = 1.67

y =  \frac{5}{3}

6 0
3 years ago
Rounding whole number which number could round to 80,600 80,532 80,549 80,617 80, ,651
Burka [1]

Answer:

80,617

Step-by-step explanation:

the 1 in the tens place puts the number back down to 600

6 0
2 years ago
a port and a radar station are 2 mi apart on a straight shore running east and west. a ship leaves the port at noon traveling no
Rom4ik [11]

Answer:

The rate of change of the tracking angle is 0.05599 rad/sec

Step-by-step explanation:

Here the ship is traveling at 15 mi/hr north east and

Port to Radar station = 2 miles

Distance traveled by the ship in 30 minutes = 0.5 * 15 = 7.5 miles

Therefore the ship, port and radar makes a triangle with sides

2, 7.5 and x

The value of x is gotten from cosine rule as follows

x² = 2² + 7.5² - 2*2*7.5*cos(45) = 39.04

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By sine rule we have

\frac{sin A}{a} = \frac{sin B}{b}

Therefore,

\frac{sin 45}{6.25} = \frac{sin \alpha }{7.5}

α = Angle between radar and ship α

∴ α = 58.052

Where we put

\frac{sin 45}{6.25} = \frac{sin \alpha }{x} to get

\frac{x}{6.25} = \frac{sin \alpha }{sin 45} and differentiate to get

\frac{\frac{dx}{dt} }{6.25} = cos\alpha\frac{\frac{d\alpha }{dt}  }{sin 45}

\frac{15sin45 }{6.25cos\alpha } =\frac{d\alpha }{dt}  }= 3.208 degrees/second = 0.05599 rad/sec.

6 0
3 years ago
Find the constant rate of change.
Aleonysh [2.5K]

Answer:

-1

Step-by-step explanation:

slope = y2-y1/x2-x1

(5,5) (7,3)

slope = 5-3/5-7 = 2/-2 = -1

3 0
2 years ago
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