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Cloud [144]
4 years ago
5

Need help on these 2 asap

Mathematics
1 answer:
Alina [70]4 years ago
3 0
I feel like #19 is cut off...

20. 72000000 = 7.2 x 10^7

if you do 72000000.0 and move the decimal to the left until the number is less than 10, it'll be 7 spaces.
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One half a number decreased by 3 is 21 what is the equation for this statement
Liono4ka [1.6K]

Question:

What is the equation for the following statement,"One-half of a number decreased by 3 is 21.

Answer:

<em>half the number = x/2 </em>

<em>decreased by 3 </em>

<em>(x/2) -3 =21</em>

<em>=48</em>

5 0
4 years ago
Read 2 more answers
Solve by Factoring<br><br> 3b^4−6b^2+27b
Ganezh [65]

Answer:

Step-by-step explanation:

hello :

3b^4−6b^2+27b = 3b(b^3-2b+9)

8 0
3 years ago
Which of the following expressions is equal to 1 divided by 16?
belka [17]
I wrote it somewhere else where I can’t copy and paste so hope this works!

8 0
3 years ago
Write an equation for the line that is parallel to the given line and that passes through the given point. y = –6x + 2; (–1, 2)
kap26 [50]
Parallel=same slope
Y=mx+b
Sub in the slope and point to solve for b
2=-6(-1)+b
2=6+b
2-6=b
-4=b
The equation is y=-6x-4; the answer is B
Hope this helps!
6 0
4 years ago
4. If the paint costs $30 per gallon and you need to spend $60 on supplies, and you can
Bezzdna [24]

Step-by-step explanation:

if I understand this right, then you need paint and additional supplies.

but I don't see any information indicating how many gallons of paint I will need.

so, I can go only with the 1 gallon specified.

so,

1×30 + 60 = $90

we can save $45 per month.

then we need

90 / 45 = 2

months to have enough money.

please update the numbers to how many gallons you really need, and then take that result and divide it by the 45 savings per month.

3 0
3 years ago
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