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3 years ago

3x²-2x-21 ..............

Mathematics

1 answer:

Olenka [21]3 years ago

7 0

Download Photomath! Put that in and it gives you the answer and the work to go with it!

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Which of these strategies would eliminate a variable in the system of equations?

melomori [17]

5x -2y = 2 is the answer

8 0

3 years ago

Help I really don’t get this

kvasek [131]

Answer:

Ok so the b is a coefficient which means it needs to be replaced by a number.

The 7 is gonna be multiplied by that coefficient then subtracted by 3.

Hope this helped.

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

PLEASE HELP!!!

Black_prince [1.1K]

Answer:

Step-by-step explanation:

substitute and solve:

100 = bh

100 = b(2b)

100 = 2b²

50 = b²

b = √50

b = √(25 * 2)

b = 5√2

solve for h:

h = 2b

h = 2(5√2)

h = 10√2

if you are told to round to 1 DP :

b ≈ 7.1 m

h ≈ 14.1 m

3 0

3 years ago

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Plzzz help! Answer quick

-BARSIC- [3]

Answer:

The answer is 6

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Help please I'm stuck show and explain your work

Deffense [45]

The expressions D, E, and F represent a correct solution to the equation.

Step-by-step explanation:

Step 1:

First, we need to solve the given equation and find the value of x which satisfies the equation.

$6(x+4)=20, (x+4) = \frac{20}{6} = 3.333,$

$x = 3.333 - 4 = -0.666.$

So the value of x for the given equation is -0.666.

Step 2:

Now we evaluate the values of the six given options to see which ones have an x value of -0.666.

A. $\frac{20-4}{6}= \frac{16}{6} = 2.666,$

B. $\frac{1}{6} (20-4)= \frac{1}{6} (16)=\frac{16}{6} = 2.666,$

C. 20 -6 -4 = 20 - 10 = 10.

D. $\frac{20}{6} -4= 3.333 - 4 = -0.666,$

E. $\frac{1}{6} (20-24) = \frac{1}{6} (-4)= -0.666,$

F. $(20-24)\frac{1}{6} = (-4)\frac{1}{6} = -0.666.$

So the options D, E, and F represent a correct solution to the given equation.

7 0

4 years ago