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3 years ago

4a^2-8a=0solve by competing square

Mathematics

2 answers:

Mandarinka [93]3 years ago

7 0

Answer:

4a²-8a=0

4a(a−2)=0

The final solution is all the values that make 4a(a−2)=0 true.

a=0,2

Step-by-step explanation:

zalisa [80]3 years ago

6 0

Answer:

a=0 or a=2

Hope it helped!

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at a country concert,the ratio of number of the Boys to the number of girls is 2:7 if there are 250 more girls than boys how man

sergey [27]

Answer:

100

Step-by-step explanation:

Ratio is a fraction, so ratio of boys to girls would be written as [let boys be "b" and girls be "g"]:

$\frac{b}{g}=\frac{2}{7}$

Also, there are 250 more girls than boys, so we can write:

g = 250 + b

Lets substitute this into "g" of the ratio we wrote and cross mulitply and solve for b:

$\frac{b}{g}=\frac{2}{7}\\\frac{b}{250+b}=\frac{2}{7}\\7b=2(250+b)\\7b=500+2b\\5b=500\\b=\frac{500}{5}=100$

The number of boys = 100

3 0

3 years ago

In May, the school store sells 80 erasers. In June, the store sells only 16 erasers. What is the percent of change in erasers so

lawyer [7]

Answer: 80%

Step-by-step explanation:

Since we have given that

Number of erasers sold in May = 80

Number of erasers sold in June = 16

Decrement in 1 month gap is given by

16-80=-64

So, Percentage of change in erasers sold from May to June is given by

$\frac{-64}{80}$ × 100

= -80% (Decreased 80%)

4 0

3 years ago

16. Interest earned:

photoshop1234 [79]

$\bf ~~~~~~ \textit{Simple Interest Earned} \\\\ I = Prt\qquad \begin{cases} I=\textit{interest earned}\\ P=\textit{original amount deposited}\dotfill & \$1250\\ r=rate\to 3\%\to \frac{3}{100}\dotfill &0.03\\ t=years\dotfill &4 \end{cases} \\\\\\ I=(1250)(0.03)(4)\implies I=150$

3 0

3 years ago

Jasmine had a pizza party with 3 of her friends to celebrate the Last Day of school. They order two pizzas. Each pizza had 8 sli

loris [4]

Answer:

3 slices

Step-by-step explanation:

Jasmine + 3 of her friends = total of 4 people

Two pizzas

8*2 = 16 (slices)

16-4=12

12/4=3

7 0

3 years ago

Name a pair of vertical and adjacent angles in each figure. Find m<1

Grace [21]

Answer:

80 degrees

Step-by-step explanation:

Vertical angles are congruent, meaning that if a vertical angle is 80 degrees, the other vertical angle is 80 degrees; they have the same angle measure.

m < 1 = 80 degrees

3 0

2 years ago

4a^2-8a=0solve by competing square​

4a^2-8a=0solve by competing square