All categories

3 years ago

Choose all expressions that are equal to 28.3.

Mathematics

1 answer:

kupik [55]3 years ago

4 0

Answer:

A, B, D, and E are equal to 28.3

You might be interested in

Please help me!! :(((

KiRa [710]

Y=-4x²-4x+8

= -4(x²+x-2)

= 4(x+2)(x-1)

(-2,0),(1,0)

3 0

3 years ago

Which ordered pair is a solution to the system of linear equations 1/2x-3/4y=11/60 and 2/5x+1/6y=3/10

natka813 [3]

ANSWER

$( \frac{2}{3} , \frac{1}{5} )$

EXPLANATION

The first equation is

$\frac{1}{2} x - \frac{3}{4} y = \frac{11}{60} ...(1)$

The second equation is

$\frac{2}{5} x + \frac{1}{6} y = \frac{3}{10} ...(2)$

We want to eliminate y, so we multiply the first equation by

$\frac{4}{5}$

$\frac{4}{5} \times \frac{1}{2} x - \frac{4}{5} \times \frac{3}{4} y = \frac{11}{60} \times \frac{4}{5}$

$\frac{2}{5} x - \frac{3}{5} y = \frac{11}{75} ...(3)$

We now subtract equation (3) from (2)

$(\frac{2}{3} x - \frac{2}{3} x )+ ( \frac{1}{6} y - - \frac{3}{5}y ) =( \frac{3}{10} - \frac{11}{75} )$

$\frac{1}{6} y + \frac{3}{5}y =\frac{3}{10} - \frac{11}{75}$

$\frac{23}{30}y = \frac{23}{150}$

Multiply both sides by

$\frac{30}{23}$

$\implies \: \frac{30}{23} \times \frac{23}{30}y= \frac{23}{150} \times \frac{30}{23}$

$\implies \: y = \frac{1}{5}$

Substitute into the first equation to solve for x .

$\frac{1}{2} x - \frac{3}{4} \times \frac{1}{5} = \frac{11}{60}$

Multiply to obtain

$\frac{1}{2} x - \frac{3}{20} = \frac{11}{60}$

$\frac{1}{2} x = \frac{11}{60} + \frac{3}{20}$

$\frac{1}{2} x = \frac{1}{3}$

Multiply both sides by 2.

$2 \times \frac{1}{2} x =2 \times \frac{1}{3}$

$x = \frac{2}{3}$

The solution is

$( \frac{2}{3} , \frac{1}{5} )$

5 0

3 years ago

Read 2 more answers

Which is the equation of the line

erastova [34]

Slope = 6/-2 = -3
b = 6

y = -3x + 6
so
3x + y = 6

answer is b. (second choice)

7 0

3 years ago

Read 2 more answers

For the data set: 12, 8, 6, 6, 9, 8, 7, 11, 6, “6” is the value for which measure?

kogti [31]

Answer: I will know once I use cal

Step-by-step explanation:

4 0

3 years ago

I need help on questions 30 and 32 plz

Anuta_ua [19.1K]

Answer:

send the question

Step-by-step explanation:

5 0

4 years ago