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3 years ago

Add or subtract -1+(-3)

Mathematics

1 answer:

Taya2010 [7]3 years ago

4 0

Answer:

It owuld be -2

Step-by-step explanation:

Yes

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Write 3 tens 9 ones in another way

Vsevolod [243]

3 tens is 3 * 10 = 30
9 ones is 9 * 1 = 9
30 + 9 = 39
Answer: 39

5 0

3 years ago

a rhombus as an area of 72 ft and the product of the diagonals is 144. What is the length of each diagonal?

SashulF [63]

A = (1/2)(x)(y)

Let x = diagonal 1

Let y = diagonal 2

The product of xy = 144.

This means that x = 12 and y = 12.

So, 12 • 12 = 144

Each diagonal is 12 feet.

Prove:

72 feet = (1/2)(12)(12) feet

72 feet = (1/2)(144) feet

72 feet = 72 feet

6 0

4 years ago

A train travels from Washington DC to new york(225 miles). The train departs at 4:55 PM and arrives in New York at 7:55 PM. What

mylen [45]

Answer:

The average speed is:

$\var{v}=75\: miles/h$

Step-by-step explanation:

The average speed equation is given by:

$\var{v}=\frac{\Delta x}{\Delta t}$

Were:

Δx is the displacement (225 miles)
Δt is the change in time (3 hours)

Then we have:

$\var{v}=\frac{225}{3}$

$\var{v}=75\: miles/h$

I hope it helps you!

4 0

2 years ago

If the mass of two objects is increased, what is the effect on the force between them?

almond37 [142]

Answer:

Step-by-step explanation:

The formula used for this type of question is

$F = \frac{Gm_1m_2}{r^2}$

so as long as you don't change anything else (like r), changing m will increase the force. Both of the last 2 answers look like they might be feasible, but they are not. The attraction increases.

So the answer is A

7 0

3 years ago

Read 2 more answers

Rational between √16 and √17<br><br>

Tomtit [17]

Answer:

41/10

Explanation:

sqrt16 = 4

sqrt17 = 4.12

4.1 = 41/10 and 4<4.1<4.12

3 0

3 years ago

Add or subtract -1+(-3)​

Add or subtract -1+(-3)