All categories

2 years ago

HELP please

Mathematics

1 answer:

melisa1 [442]2 years ago

7 0

Answer:

Not proportail because the B is not 0.

Step-by-step explanation:

You might be interested in

25. Two planes leave the airport at the same time. Their speeds are 135mph and 162mph, and the angle between their two paths is

sdas [7]

Answer:

The two planes are 349 miles apart.

3 0

3 years ago

Solve the following system of equations for a and for b:

viktelen [127]

Answer:

$a=3\\b=1$

Step-by-step explanation:

$9a+3b=30\\8a+4b=28$

Let's solve the second equation for a to later on replace it in the first equation.

$8a+4b=28\\8a=28-4b\\a=\frac{28-4b}{8}$

Now plug this into the first equation.

$9a+3b=30\\9(\frac{28-4b}{8})+3b=30$

Distribute the 9

$(\frac{252-36b}{8}) +3b=30$

Break down the fraction.

$\frac{252}{8}-\frac{36b}{8}+3b=30$

Simplify.

$\frac{63}{2}-\frac{9}{2}b+3b=30$

Subtract $\frac{63}{2}$

$-\frac{9}{2}b+3b=30-\frac{63}{2}$

Combine like terms.

$\frac{-9+2*3}{2}b=\frac{30*2-63}{2}$

$\frac{-9+6}{2}b=\frac{60-63}{2}$

$\frac{-3}{2}b=\frac{-3}{2}$

Muliply by the reciprocal or inverted fraction next to b.

$(-\frac{2}{3})(-\frac{3}{2}) b=-\frac{3}{2}(-\frac{2}{3})$

$b=1$

Now plug this value into any of the equations to find the value of a.

$8a+4b=28\\8a+4(1)=28\\8a+4=28\\8a=28-4\\8a=24\\a=\frac{24}{8}\\ a=3$

5 0

3 years ago

The science club sold 24 t-shirts last week and 18 T-shirts this week. What is the percentage of decrease in the number of T-shi

MAVERICK [17]

Answer:

D) 75%

Step-by-step explanation:

75% of 24 = 0.75 x 24 = 18

6 0

2 years ago

What is the solution of the equation? 35√(x+2)3+3=27

Arte-miy333 [17]

Use this rule: (x^a)^b = x^ab

3(x + 2)^3/5 + 2 = 27

Subtract 3 from both sides

3(x + 2)^3/5 = 27 - 3

Simplify 27 - 3 to 24

3(x + 2)^3/5 = 24

Divide both sides by 3

(x + 2)^3/5 = 24/3

Simplify 24/3 to 8

(x + 2)^3/5 = 8

Take the cube root of both sides

x + 2 = 3/5√8

Invert and multiply

x + 2 = 8^5/3

Calculate

x + 2 = 2^5

Simplify 2^5 to 32

x + 2 = 32

Subtract 2 from both sides

x = 32 - 2

Simplify 32 - 3 to 30

x = 30

4 0

3 years ago

Find two numbers, both smaller than 150, that have a lowest common multiple of 882 and a highest common factor of 21.

GenaCL600 [577]

Answer:

42 and 21

Step-by-step explanation:

Just divide 882 by 21 to get 42

3 0

1 year ago