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3 years ago

Help fast

Mathematics

1 answer:

tatuchka [14]3 years ago

3 0

750 international minutes

100-25=75

75÷0.10=750

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The density of iron is 7.8 g/cm3 . An iron beam has a volume of 10,504 cm³.

myrzilka [38]

The formula to find density is Mass/Volume

We have
Density = $7.8$ $\frac{g}{cm^{3}}$
Volume = $10504 cm^{3}$

Hence
Mass = 7.8×10504 = 81931.2 gram

6 0

3 years ago

Read 2 more answers

Part A

lesya692 [45]

Each candy bar cost $5

work:
x = cost of candy bar

3+8(x)=43
-3. -3 < subtract 3 both sides
——————
8(x)= 40
—— —— 8 8

x=5

4 0

3 years ago

Can someone help please asap

Troyanec [42]

Answer:

1. a i think

Step-by-step explanation:

2. 5.81818

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3 years ago

Solve x2 + 2x = 4 for x by completing the square. x equals plus or minus square root of 5 plus 1 x equals plus or minus square r

steposvetlana [31]

Answer:

x equals plus or minus square root of 5 minus 1

Step-by-step explanation:

we have

$x^{2} +2x=4$

Divide by 2 the coefficient of the x-term

$2/2=1$

squared the number

$1^2=1$

Adds both sides

$x^{2} +2x+1=4+1$

$x^{2} +2x+1=5$

Rewrite as perfect squares

$(x+1)^{2}=5$

take the square root both sides

$x+1=(+/-)\sqrt{5}$

$x=(+/-)\sqrt{5}-1$

therefore

x equals plus or minus square root of 5 minus 1

4 0

3 years ago

How do you graph it on a line

Aleonysh [2.5K]

In order to draw x ≤ -10 on a number line, first draw a closed dot at -10. This is because we have a ≤ and not a <. If we had a <, it would be an open dot.

Next, since we want x to be smaller, draw an arrow pointing towards all numbers that are smaller. This arrow would point to the left.

8 0

3 years ago