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3 years ago

Find −3(− 4/7 ). You may find using a number line to be helpful. Enter your answer as a simplified mixed number.

Mathematics

1 answer:

Ivan3 years ago

5 0

12/7 or 1 5/7

Simply multiply things

Mark brainliest please

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two fields at a state park are 1,000 meters from each other. on a map the two fields are 8 centimeters apart. what scale is the

nataly862011 [7]

Answer:

1 centimeter on the map=125 meters

Step-by-step explanation:

We need to find how many meters for 1 centimeter, because that is the lowest value.

So, divide 8 by 8 to get 1 centimeter.

To get its equal distance, divide 1000 by 8 as well.

1000/8=125

Hope this helps!

8 0

4 years ago

An attacker at the base of a castle wall 4 m high throws a rock straight up with speed 7.5 m/s from a height of 1.5 m

Sergeu [11.5K]

Answer:

a) Yes, b) $v\approx 2.686\,\frac{m}{s}$ , c) $v_{o} \approx 7.002\,\frac{m}{s}$

Step-by-step explanation:

a) The maximum height reached by the rock is:

$\Delta y = \frac{\left(0\,\frac{m}{s} \right)^{2}-\left(7.5\,\frac{m}{s} \right)^{2}}{2\cdot \left(-9.807\,\frac{m}{s^{2}} \right)}$

$\Delta y = 2.868\,m$

$y = 1.5\,m + 2.868\,m$

$y = 4.368\,m$

Yes, the rock will exceed the top of the wall.

b) The speed when the rock reaches the top of the wall:

$v = \sqrt{\left(7.5\,\frac{m}{s} \right)^{2}+2\cdot \left(-9.807\,\frac{m}{s^{2}} \right)\cdot (4\,m-1.5\,m)}$

$v\approx 2.686\,\frac{m}{s}$

c) The initial speed required so that stone does not exceed the top of the wall is:

$v_{o} = \sqrt{\left(0\,\frac{m}{s} \right)^{2}-2\cdot \left(-9.807\,\frac{m}{s^{2}} \right)\cdot (4\,m-1.5\,m) }$

$v_{o} \approx 7.002\,\frac{m}{s}$

8 0

4 years ago

Steve,Jerry and Ron were paid $29.25 to remove garden gnomes. They each worked 4 hours, exempt for Ron, who was 1 hour late. How

Alenkasestr [34]

Ron should receive $7.98. Jerry and Steve each worked for 4 hours, while Ron was one hour late, so he worked for 3 hours. Together, they worked for 4*2+3=11 hours, receiving $29.25 in total. Each hour should be paid 29.25/11=2.66 dollars. Ron worked for three hours, so he should receive 3*2.66=7.98 dollars.

5 0

4 years ago

What is the rate of change according to the table below?

pychu [463]

Answer:

lets make this like a table

x y

3=21

4=28

5=35

so since y is bigger lets divide that by x

21/3=7

so the rate of change is 7

Hope This Helps!!!

5 0

2 years ago

Find FH A. 13.5 B. 6.0 C. 8.1 D. 6.7

Black_prince [1.1K]

Step-by-step explanation:

the FH seems to be option b.6.0

........

3 0

3 years ago