The number of math problems was increased from 15 to 21. By what percent did the number of problems increase?

A 20%
B 30%
C 40%
D 45%

Answer:

$16.57

Step-by-step explanation:

15.49 increase 7% =

15.49 × (1 + 7%) = 15.49 × (1 + 0.07) = 16.5743

Answer:tan c

Step-by-step explanation:

Answer:

4(9a−4)

Step-by-step explanation:

Answer: -2x²+2x-10

Step-by-step explanation:

Rephrase the expression

Subtract 4x²-7x+6 from 2x²-5x-4

(2x²-5x-4)-(4x²-7x+6)

Expand parenthesis

2x²-5x-4-4x²+7x-6

Put like terms together

(2x²-4x²)+(7x-5x)-(4+6)

Combine like terms

-2x²+2x-10

Hope this helps!! :)

Please let me know if you have any questions

Step-by-step explanation:

3x-4y=13

y=-3x-7

3x-4(-3x-7)=13

3x+12x+28=13

15x=-15

x= -1

y= -3x-7 = 3-7= -4

( -1, -4)

Answer:

Yes, she should.

Step-by-step explanation:

5% may not seem like a lot. Lets say she deposits $20 per month. That's $240 a year. Lets also say you keep this for 6 years, you'll have $72 from interest. The more amount she puts in the more she'll gain.

First, converting R percent to r a decimal

r = R/100 = 5%/100 = 0.05 per year,

then, solving our equation

I = 240 × 0.05 × 6 = 72

I = $ 72.00

The simple interest accumulated

on a principal of $ 240.00

at a rate of 5% per year

for 6 years is $ 72.00.

Yes, she should keep  her account open even though she can deposit only a small amount each month.

Since Chenelle has a savings account that earns 5% simple interest each year.

So here we assume that she deposit $20 per month

So for year it should be 240

And the number of years should be 6 so the interest be like 72

Now

I = 240 × 0.05 × 6

I = 72

Hence, Yes, she should keep  her account open even though she can deposit only a small amount each month.

Learn more about interest here: https://brainly.com/question/24455071

Answer:

2.5% , $8608

Step-by-step explanation:

Given data

From the given the expression V = 8000×(1.025)^n

The rate is given as

2.5%

For n= 3

The total amount is

V = 8000 × (1.025)^3

V= 8000*1.076

V= $8608

Hence the final amount is $8608

Answer:

c

Step-by-step explanation:

7^5 means that there are 5 7s eg 2^4 would be 2×2×2×2

Answer:

1299

Step-by-step explanation:

To find the equivalent of the persentege in money u do

(8.25)/100 *1200

that is 99

than u simply do 1200+99=1299

They are not the same

The reason why they arent that same is bc they both are in different orders i hope this helps u and may i get brainliest? <3

Answer:

x+1 SQUARE units

Step-by-step explanation:

Area of a rectangle is height times width or you could just say the length on one side times the length of a side right next to it.

If the rectangle is x+1 units long and 1 unit high, then the answer is (x+1)  x 1  = x +1 because anything times 1 is always just what you started with.

Answer:

X=2

Step-by-step explanation:

3x-12=-4x+2

7x-12=2

7x=14

x=2

Answer:

?

Step-by-step explanation:

Answer:

m=-2

Step-by-step explanation:

the formula for slope (m) is (y2-y1)/(x2-x1)

the given points are (3,-7) and (4,-9)

label the points;

x1=3

y1=-7

x2=4

y2=-9

substitute into the equation:

m=(-9--7)/(4-3)

m=(-9+7)/(1)

m=-2/1

the slope is -2

hope this helps!

Answer:

16 feet

Step-by-step explanation:

5 inches = 80 1 inch = 80/5= 16feet

Answer:

x=12 ft

Step-by-step explanation:

5/80=.75/x

5x=60

x=12 ft

Answer:

8 batches

Step-by-step explanation:

A recipe for cookies calls for 2/3 of a cup of sugar. Elena used 5 1/3 cups of sugar to make multiple batches of cookies. How many batches did she make?

From the above question, 1 recipe = 1 batch of cookies

Hence:

2/3 cup of sugar = 1 batch of cookies

5 1/3 cups of sugar = x batches of cookies

Cross Multiply

2/3 cup × x batches = 5 1/3 cup × 1 batch

x batches = 5 1/3 cup × 1 batch/2/3 cup

x batches = 16/3 ÷ 2/3

x batches = 16/3 × 3/2

= 8 batches

Therefore she made 8 batches

Answer:

x= 2

Step-by-step explanation:

7x = 13x -12

0= 13x-12-7x

12= 13x-7x

12= 6x

2= x

you need to bring all the X's to one side then solve from there

Answer:

x=2

Step-by-step explanation:

7x=13x-12

Subtract 13x from both sides

7x-13x=13x-12-13

-6x=12

Divide both sides by -6

-6x/-6=-12/-6

simplify

x=2

Answer:

a c

Step-by-step explanation:

Answer:

[tex]8x + 7 =15 \\ gx + 2 =4 \\ [/tex]

Answer:

The answer to this equation should be 59.06 I hope I helped:)

Answer:

X=11

b. 30

c. 30

Step-by-step explanation:

Answer:

86

Step-by-step explanation:

21   36

52   40

32   86

33   38

28   34

30   19

Answer:

2.Movies

3.Meet Cherry

4.Fall Asleep

5.Darry hits pony

6.Pony and Johny run to the park

7.Underwater

8.Money and Directions

9.Windrixville

10.Save kids

11.Interview newspaper

12.Randy talks to pony

13.Hospital

14.Switchblade

15.

Step-by-step explanation:

The solution set of the given inequality is  {b| b > 20}.

Here we have the inequality (3/4)b > 15 and we want to solve it. To do so, we just need to isolate the variable b.

And to do it, we can work with this like we would do with any equation, we can just multipy both sides by (4/3) so we get:

(4/3)*(3/4)*b > 15*(4/3)

b > 20

Then the solution set can be written as {b| b > 20}

That is the set of all values larger than 20.

Learn more about inequalities at:

https://brainly.com/question/24372553

#SPJ1

Answer:

tan y°

Step-by-step explanation:

by using the Sine Rule (See attached), we can form the equation:

[tex]\frac{r}{sin (y)} = \frac{p}{sin (x)}[/tex]

rearranging this, we get:

[tex]\frac{r}{p} =\frac{sin(y)}{sin(x)}[/tex]   ---------------------eq 1

Recall that all internal angles of a triangle must sum to 180°. we observe that we have a right triangle where one of the angles is 90°. It then follows that the sum of the other two angles must sum to 90°

i.e x + y = 90°

with a little rearranging, we get

x = (90° - y)

Substituting this into eq 1 above, we get:

[tex]\frac{r}{p} =\frac{sin(y)}{sin(90- y)}[/tex]  ---------eq 2

recall that from the trigonometric co-function identities,

sin (90°- y) = cos y

substituting this into eq 2 gives :

[tex]\frac{r}{p} =\frac{sin(y)}{cos(y)} = tan(y)[/tex]   (answer)