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3 years ago

Can I get someone to help me on this please

Mathematics

1 answer:

Vera_Pavlovna [14]3 years ago

4 0

i think its the second graph

hope i helped

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Linear Combination 3x + 2y = −4 4x −y = 13

Elanso [62]

BY ADDING BOTH THE EQUATIONS

7x+y=9

HOPE THIS WILL HELP U

3 0

3 years ago

If a ball is thrown into the air with a velocity of 34 ft/s, its height (in feet) after t seconds is given by y = 34t − 16t2. Fi

Finger [1]

ANSWER:

If a ball is thrown into the air with a velocity of 34 feet per second, then velocity of the ball after 1 second is 2 feet per second

SOLUTION:

Given, a ball is thrown into the air with a velocity of 34 feet per second

Initial velocity (u) = 34 feet per second

And also given a relation between displacement and time = $\mathrm{y}=34 \mathrm{t}-16 \mathrm{t}^{2}$ --- eqn 1

We need to find the velocity when t = 1 ; v = ?

We know that, v = u + at and $\mathrm{s}=\mathrm{ut}+\frac{1}{2} \mathrm{at}^{2}$

where v is instantaneous velocity and u is initial velocity

a is acceleration

t is time interval

s is displacement

using the displacement and time relation eqn (1) we get

Now, when t = 1, displacement s = 34(1) – 16(1)

$\mathrm{ut}+\frac{1}{2} \mathrm{at}^{2}=34-16$

$34 \times 1+\frac{1}{2} \times a \times 1^{2}=18$

$34+\frac{a}{2}=18$

$\begin{array}{l}{\frac{a}{2}=18-34} \\\\ {\frac{a}{2}=-16} \\ {a=-16 \times 2} \\ {a=-32}\end{array}$

here, -ve sign indicates that object is in deceleration . so acceleration is -32 ft/s

now put a value in v = u + at

v = 34 + (-32)(1)

v = 34 – 32

v = 2 ft/s

Hence, velocity of the ball after 1 second is 2 ft/s

6 0

3 years ago

A sociologist recorded the estimated life expectancies of women born in Center City. Use the data from women born in 1970 and 20

ANEK [815]

Y = 0.213x – 352.0 represents this linear model shown in the data table.
Plug in the values of x into the equation for a double check.
Let's try 1980.

y = 0.213(1980) – 352.0
y = 69.74
which is closest to the 70.1 whereas other options do not satisfy the condition.

6 0

3 years ago

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Every other weekend,Bronwyn Brother Danial mows the lawn. He can mow 15,000ft2 in 3/4 hour. who mows the lawn in less time? plea

ivann1987 [24]

Answer:

you left something out but you need to put it in a better understanding

Step-by-step explanation:

7 0

3 years ago

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. The larger of two numbers is 7 less than twice the

Ganezh [65]

Answer:

x = 2y - 7

x + y = 47

substitute x

2y - 7 + y = 47

3y = 54

y = 18

x = 2x18 - 7

x = 29

4 0

3 years ago