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3 years ago

9

Which phrase describes density? height of a point above sea level force pushing on an area or a surface amount of mass in a cert

ain volume amount of matter an object contains

2 answers:

hichkok12 [17]3 years ago

5 0

The answer will be amount of mass in a certain volume .

aalyn [17]3 years ago

5 0

Answer:

C. amount of mass in a certain volume

Step-by-step explanation:

I got it right on the quiz =)

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Which equation has the same soultions as x^2+6×-7=0

blagie [28]

$x^2+6x-7=0 \\ a=1 \\ b= 6 \\ c=-7 \\ \\ \boxed{\boxed{\Delta=b^2-4ac}} \\ \\ \Delta=6^2-4*1*(-7) \\ \Delta=36-(-28) \\ \Delta=64 \\ \Delta\ \textgreater \ 0 \Rightarrow \text{we have 2 solutions :} X_1 \ and X_2 \\ \\ \boxed{X_1= \frac{-b- \sqrt{\Delta} }{2a} } \Rightarrow X_1= \frac{-6-8}{2}=-7 \\ \\ \boxed{X_2= \frac{-b+ \sqrt{\Delta} }{2a} } \Rightarrow X_2= \frac{-6+8}{2} =1$

4 0

3 years ago

Mario walked 7422 steps one day then he walks 5570 stops the next day. which calculation can be used to find the total number of

vovikov84 [41]

Answer:

A caucluation he can use is adding, just add 7422 and 5570 and you should get your answer.

Step-by-step explanation:

4 0

3 years ago

Rudiy27

I think you're missing a bit of the question. If her savings can be modeled by x...?

3 0

3 years ago

The fourth term of an Arithmetic Sequence is equal to 3 times the first term, and the seventh term exceeds twice the third term

11Alexandr11 [23.1K]

Answer:

The first term is 3. The common difference is 2.

Step-by-step explanation:

The first term is x.

The common difference is d.

The second term is x + d.

3rd term: x + 2d

4th term: x + 3d

7th term: x + 6d

"The fourth term of an Arithmetic Sequence is equal to 3 times the first term"

x + 3d = 3 * x Eq. 1

"the seventh term exceeds twice the third term by 1"

x + 6d = 2(x + 2d) + 1 Eq. 2

Simplify Eq. 1:

2x = 3d

Simplify Eq. 2:

x + 6d = 2x + 4d + 1

x = 2d - 1

Multiply both sides of the last equation by 2.

2x = 4d - 2

2x = 3d (simplified Eq. 1)

Since 2x = 2x, then the right sides are equal.

3d = 4d - 2

d = 2

2x = 3d

2x = 3(2)

2x = 6

x = 3

Answer: The first term is 3. The common difference is 2.

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3 years ago

Suppose 1.5 liters of water come out of a faucet each minute. For how many minutes was the faucet on if 18.6 liters of water cam

Stolb23 [73]

Answer:

It was on for 12.4 minutes

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers