3 years ago

5x + 3y=33 when y= 2x + 1

Mathematics

1 answer:

inn [45]3 years ago

3 0

Hope that this helps.

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Need help ! Which equation could be represented by the number line?

DanielleElmas [232]

Answer:

I think its b

Step-by-step explanation:

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3 years ago

Martin throws a ball straight up in the air. the equation h(t) = -16t^2 + 40t + 5 gives the height of the ball, in feet, t secon

Lisa [10]

Answer:

2.62 seconds

Step-by-step explanation:

Let

t ----> the time in seconds

h(t) ----> he height of the ball, in feet

we have

$h(t)=-16t^2+40t+5$

we know that

When the ball hits the ground, the height is equal to zero

$-16t^2+40t+5=0$

The formula to solve a quadratic equation of the form

$at^{2} +bt+c=0$

is equal to

$t=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-16t^2+40t+5=0$

$a=-16\\b=40\\c=5$

substitute in the formula

$t=\frac{-40\pm\sqrt{40^{2}-4(-16)(5)}} {2(-16)}$

$t=\frac{-40\pm\sqrt{1,920}} {-32}$

$t=\frac{-40+\sqrt{1,920}} {-32}=-0.12\ sec$

$t=\frac{-40-\sqrt{1,920}} {-32}=2.62\ sec$

therefore

The solution is t=2.62 seconds

4 0

3 years ago

IS THIS THE ANSWER????

andreyandreev [35.5K]

This answer is correct. The absolute value of a number is its distance from 0, and we are looking for an absolute value of 1. Both -1 and 1 are 1 whole number away from 0.

7 0

3 years ago

Read 2 more answers

The proper scientific notation for 676,000,000,000 is?

tia_tia [17]

6.76 x 10^11
this is because when you are placing something in a scientific notation you basically move the decimal place behind the last hole number in this case 6. and count the remaining numbers behind the decimal such as .76,000,000,000 which there 11 counting 76 with the zeros. then you place the number of places behind the decimal as an exponent of 11 and keep all real numbers besides 0 as your other half

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3 years ago

Need answer ASAP! True of false: (x−6) is a factor of 4x3−18x2+3x−13. True of False

Fantom [35]

Answer:

If you mean 4x to the power of 3 - 18x to the power of 2 +3x -13 then the answer is false

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3 years ago