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4 years ago

Which one do i choose help melee ill award 30 point plssss

Mathematics

2 answers:

Amanda [17]4 years ago

5 0

Answer:

see below

Step-by-step explanation:

1 1/4 > z

Open circle and 1 1/4 since there is no equals sign

line goes to the left since z is less than the number

dalvyx [7]4 years ago

5 0

Since we are working with the ">" symbol, its going to be an open circle.

Since 5/4 is greater than z, that means that the lie will go on forever to the left.

The arrow second from last is the correct answer (the that is a left arrow with an open circle).

Best of Luck!

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Write an algebraic expression for the word phrase c divided by 7.

Y_Kistochka [10]

Answer:

D. c/7

Step-by-step explanation:

An algebraic expression refers to the equation. In the question, it says to divide a number (c) by seven, giving you c/7

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4 years ago

What are geologists able to tell archaeologists about fossils?

Shalnov [3]

Answer:

C. . how old they are

Step-by-step explanation:

Geologist are people that deal with the internal structure of the earth.

They study Rocks, and it's deposit accumulated millions of years back.

They can also give account of what happened in the past and the types of organisms that existed in the past.

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3 years ago

What would 85% of 690 lbs be?

Elodia [21]

85% of 690 lbs would be 586.5

5 0

3 years ago

Read 2 more answers

-4x+3x<4 what is the awenswer to this equation

AlladinOne [14]

Answer:

X > -4

Step-by-step explanation:

Collect the like terms which literally leaves you with -x<4

Then just changes the signs, hence the answer.

Please mark brainliest!

6 0

3 years ago

What is the sum of 20x^2-10x-30

ivann1987 [24]

Answer:

The sum of the roots is 0.5

Step-by-step explanation:

The correct question is

What is the sum of the roots of 20x^2-10x-30

we know that

In a quadratic equation of the form

$ax^{2} +bx+c=0$

The sum of the roots is equal to

$-\frac{b} {a}$

in this problem we have

$20x^{2} -10x-30=0$

$a=20\\b=-10\\c=-30$

substitute

$-\frac{(-10)} {20}=0.5$

Verify

Find the roots of the quadratic equation

The formula to solve a quadratic equation is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

$a=20\\b=-10\\c=-30$

substitute

$x=\frac{-(-10)\pm\sqrt{-10^{2}-4(20)(-30)}} {2(20)}$

$x=\frac{10\pm\sqrt{2,500}} {40}$

$x=\frac{10\pm50} {40}$

$x=\frac{10+50} {40}=1.5$

$x=\frac{10-50} {40}=-1$

The roots are x=-1 and x=1.5

The sum of the roots are

$-1+1.5=0.5$ ----> is ok

5 0

3 years ago