2. A chemist has a 25% and a 50% acid solution. How
much should be used to form 250 mL of a 35% acid
solution?
A) 80 mL of 50% solutions and 120 mL of 25% solution
B) 150 mL of 50% solution and 50 mL of 25% solution
© 60 ml of 50% solution and 140 mL of 25% solution
D) 50 mL of 50% solution and 150 mL of 25% solution
E) None of the above

Answer:

(2a+b)^2

4a^2 + 4ab + b^2

product=4

Answer:

Answer:

175 in³

Step-by-step explanation:

First the area of the triangle:

S: ½a×b×SinC

½×7in×10in×Sin90°===> 35in²

and now the volume

35 in²×5 in=175 in³

Answer:

y=mx+b

Step-by-step explanation:

m is your slope, b is the y intercept. Y axis=slope x+y intercept

Answer:

just use the line on the graph :D

Step-by-step explanation:

f(6) =2

the maximum is 7

hope this helps!

Answer:

48.34%

Step-by-step explanation:

Answer:

48%

Step-by-step explanation:

248/513 is .483430799, so rounded is 48%

Answer:

In a deck of cards, there are 6 faced cards. So, the probability of drawing a faced card is 6 out of 52 cards. Thus, the probability of drawing a face card from a deck of cards is 6/52 = 3/26.

Step-by-step explanation:

Answer:

4/13

Step-by-step explanation:

There are 4 10 cards.

There are 12 face cards.

Probability of both:

4/52 + 12/52 = 16/52 = 4/13

Answer:

are the best

Step-by-step explanation:

Answer:

Study hard

Step-by-step explanation:

step 1 : write

step 2 : knowledge

step 3: remember

and last but not least

STEP 4 : BE SMART

Answer:

Width of the rectangle is 8 feet

Length of the rectangle is  13 feet

Step-by-step explanation:

Complete question -

The length of a rectangular garden is three feet less than twice its width. If the perimeter of the garden is 42 feet, what is its length?

Solution

Let the width  of the  rectangle be X feet

Length of the rectangle would be 2X -3  feet

Perimeter of the rectangle is 2 (length + breadth)

Substituting the given values, we get -

Perimeter =  2 (length + breadth)

[tex]42 = 2 [(2X-3) + X]\\42 = 4X - 6 + 2X\\48 = 6X\\X = 8[/tex]

Width of the rectangle is 8 feet

Length of the rectangle is  [tex]2*8 -3 = 16-3 = 13[/tex] feet

Answer:

C. 48x = 32

Step-by-step explanation:

For which equations does the fraction 2/3 make the equation true? Choose all that apply

Solving

A. 35x =20

x = 20/35

x = 4/7

B. 26x=18

x = 18/26

x = 9/13

C. 48x = 32

x = 32/48

x = 2/3

D. 22x =14

x = 14/22

x = 7/11

The correct Option is Option C

Answer:

if I know then I will tell

Answer:

x^2+9x+8

Step-by-step explanation:

Expand the following:

(x + 1) (x + 8)

(x + 1) (x + 8) = (x) (x) + (x) (8) + (1) (x) + (1) (8):

x x + 8 x + x + 8

x x = x^2:

x^2 + 8 x + x + 8

Grouping like terms, x^2 + 8 x + x + 8 = x^2 + (8 x + x) + 8:

x^2 + (8 x + x) + 8

8 x + x = 9 x:

Answer: |

| x^2 + 9 x + 8

Answer:

1/2 and 9/14

Step-by-step explanation:

Let the first fraction be 1/2

Let the second fraction be x

1/2 + x= 8/7

x= 8/7-1/3

= 16-7/14

= 9/14

Hence the two numbers are 1/2 and 9/14

.............................

Answer:

I believe its proposition

Step-by-step explanation:

im almost 100% sure

Answer:

27.5%

Step-by-step explanation:

Hi!

To do this problem, we have to set up a percent proportion:

[tex]\frac{3.3\\}{x}[/tex] = [tex]\frac{12}{100}[/tex]

In this problem, the denominators are the percent values and the numerators are the numerical value.

x = [tex]\frac{3.3*100}{12}[/tex]

x = [tex]\frac{330}{12}[/tex]

x = 27.5%

Hope this helped.

Answer:

A=TRUE B=FALSE C=FALSE

Step-by-step explanation:

for b and c you don't know the length so you don't know what to multiply them from

PLZ  GIVE BRAINLY

This is an exponential expression with 10 as the base and 4 as the exponent.

=============================================

Explanation:

We're dividing 10^8 over 10^4. When dividing like this, we subtract the exponents (numerator minus denominator). The bases must be the same value and they stay at the same value for the final answer as well.

The new exponent is 8-4 = 4 which is how we arrive at the answer 10^4.

Side note: 10^4 = 10,000 = ten thousand

Answer:

Since from the laws of exponents we have that x−n=1xn , it implies that we may write 18=8−1 . 18=123=2−3.

Step-by-step explanation:

Answer:

The northeastern winds dry out the air over the desert and drive hot winds toward the equator. These winds can reach exceptional speeds and cause severe dust storms that can drop local visibility to zero. So basically you won’t be able to do anything, you would be dieting of heat, and won’t be able to see, so that Is whats wrong with camping in the Dahara Desert.

Step-by-step explanation:

Suppose the persons are a, b, c, d, e, f and g.

Let us also assume that a and b always sit together.

Let us then put the remaining 5 persons in a circular arrangement. It can be done in (5–1)! = 4! = 24 ways. Now, the pair (a,b) can be placed between any two persons already placed in circular order. There are 5 such gaps. Finally the pair (a,b) can be placed in two ways viz. (a,b) and (b,a).

So, total number of ways a group of 7 persons can be seated around a circular table where 2 specified persons always sit together is 24 X 2 X 5 = 240

Answer:

A or B

Step-by-step explanation:

Answer:

(5 x + 7)(x^2 + 3)

Answer: the answer is D

Step-by-step explanation:

Answer:

How can air pollution be reduced

Step-by-step explanation:

Unless someone wants everyone to die sooner then this should be the main concern

17x15=255ft

255ft

Hope this helps

Answer:

Angle EDF= 53

Step-by-step explanation:

Supplementary angle: Angle EDC and angle EDF

which means angle EDC+ Angle EDF=180

Angle EDC show in the graph 127 degree

Angle EDG= 180-127=53Degree

Explanation:

Recall that the general point-slope form is [tex]y - y_1 = m(x - x_1)[/tex] where m is the slope and [tex](x_1, y_1)[/tex] is the point the line goes through. We see that the 2 and the m match up, so m = 2 is the slope.

Side note: We can rewrite that given equation into y - (-5) = 2(x - (-1)) to see that the line goes through the point (-1, -5)

Answer:

C: 2

Step-by-step explanation:

y + 5 = 2x + 2 (distribute 2)

y = 2x -3 (subtract 5 from both sides)

2x means: slope times x

Answer:

Mass = density * volume

Mass = 6 g/cm^3 / 34 cm^3

Mass = 0.1764705882 grams

Step-by-step explanation:

Answer:

204 g

Step-by-step explanation:

*I thinks you have made a mistake with the unit of the volume*

Density = mass / volume

Mass = volume * density

mass = 6 * 34

mass =204 g

Answer:

4187 ft³

Step-by-step explanation:

[tex]\frac{4}{3}[/tex]πr³

π = 3.14

r = radius

the diameter is the straight line that passes through the centre of a circle and touches the two edges of the circle.

A radius is half of the diameter

diameter = 2r

Radius = 20 / 2 = 10 feet

(4/3) x 3.14 x 10³ = 4187 ft³

Answer: 45:315

Step-by-step explanation: