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alex41 [277]
3 years ago
14

Please answer 4 ( will give brainlst )

Mathematics
1 answer:
EleoNora [17]3 years ago
7 0

Answer:

ITS C

Step-by-step explanation

DONT KNOW HOW TO EXPLAIN

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How to mulitiply 8.18 times 2.8 don’t understand
schepotkina [342]

Answer:

Multiply it like a normal number.

Step-by-step explanation:

Take the point away in both numbers

line the numbers up and add the zero at the end of 28

multiply

add the decimal point back after solved (3 decimal points)

 818

x280

-----------

4 0
3 years ago
X = -2y + 300 3y = 800 - 4x
devlian [24]

Answer:

<h2>x = 140, y = 80</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}x=-2y+300&(1)\\3y=800-4x&(2)\end{array}\right\\\\\text{Substitute (1) to (2):}\\\\3y=800-4(-2y+300)\qquad\text{use the distributive property:}\ a(b+c)=ab+ac\\\\3y=800+(-4)(-2y)+(-4)(300)\\\\3y=800+8y-1200\\\\3y=8y-400\qquad\text{subtract}\ 8y\ \text{from both sides}\\\\-5y=-400\qquad\text{divide both sides by (-5)}\\\\y=80\\\\\text{Put it to (1):}\\\\x=-2(80)+300\\\\x=-160+300\\\\x=140

8 0
3 years ago
Read 2 more answers
Leonardo da vinci's mona lisa is 21 inches wide and 30.25 inches tall. what is the area of the painting in square centimeters?
VMariaS [17]
1 inch =2.5cm
lenght =30.25×2.5=75.625cm
width = 21×2.5=52.5cm
area of painting = 75.625×52.5=3970.3125cm²
7 0
3 years ago
Can someone plz help I do not know what I am doing
PolarNik [594]

the answer is D-n is greater then or equal to nine.

because the red dot starts on nine and goes up its greater than nine and because its on nine its also going to equal it. I had a problem getting the signs messed up when I learned it but I remember the sign always eats the greater number. I hope this answer could help and I'm sorry if the answer is incorrect.

3 0
3 years ago
Diana invested $3000 in a savings account for 3 years. She earned $450 in interest over that time period. What interest rate did
In-s [12.5K]
\bf \qquad \textit{Simple Interest Earned}\\\\&#10;I = Prt\qquad &#10;\begin{cases}&#10;I=\textit{interest earned}\to &\$450\\&#10;P=\textit{original amount deposited}\to& \$3000\\&#10;r=rate\to r\%\to \frac{r}{100}\\&#10;t=years\to &3&#10;\end{cases}&#10;\\\\\\&#10;450=3000\cdot r\cdot 3\implies \cfrac{450}{3\cdot 3000}=r\implies \cfrac{1}{20}=r&#10;\\\\\\&#10;r\%\implies \cfrac{1}{20}\cdot 100\implies r=\stackrel{\%}{5}
5 0
3 years ago
Read 2 more answers
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