3 years ago

Graph { 2x + 6y = 18 { x + y = 5

Mathematics

1 answer:

Sedbober [7]3 years ago

5 0

(3,2).......................

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Please help i will give brainliest to the first person that answers correctly

timurjin [86]

Answer:

From what i know your answer will be a.

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3 years ago

The position function for a free-falling object is s(t) = -16t^2 + vt +5. A ball is thrown upward from the top of a 400-foot bui

mixer [17]

Answer:

6.21 seconds

Step-by-step explanation:

The position function of a free-falling object is,

$s(t) = -16t^2+v_0t+s_0$

Where,

$s_0$ = initial height of the object,

$v_0$ = initial velocity of the object,

Here,

$s_0=400\text{ feet}$

$v_0=35\text{ feet per sec}$

Hence, the height of the ball after t seconds,

$s(t)=-16t^2+35t+400$

When s(t) = 0,

$\implies -16t^2+35t+400=0$

$t=\frac{-35\pm \sqrt{35^2-4\times -16\times 400}}{2\times -16}$

$t=\frac{-35\pm \sqrt{1225+25600}}{-32}$

$\implies t\approx -4.02\text{ or }t\approx 6.21$

∵ Time cannot be negative,

Hence, after 6.21 seconds the ball will reach the ground.

4 0

3 years ago

Solve the system of equations below.

Ostrovityanka [42]

C - no solution
you take the second solution and times the entire equation by -1
then simply
and you get 0x + 0y = 20

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3 years ago

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What is the value of the red dot on the number line below?

Mila [183]

Answer:

B, 9.625

Step-by-step explanation:

I know there's a more surefire method of doing this problem but since this is multiple choice, you can use process of elimination to solve it.

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3 years ago

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While shopping Marcy spent $59. If the amount she spent is 25% of her savings, how much savings did she have before she shopped

aliya0001 [1]

Answer:

Savings= $236

Step-by-step explanation:

Giving the following information:

Money spent= $59

Proportion of savings= 25% = 0.25

<u>To calculate the total savings before shopping, we need to use the following formula:</u>

Savings= money spent / proportion of savings

Savings= 59 / 0.25

Savings= $236

7 0

3 years ago