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monitta
3 years ago
6

Help I don’t understand this

Mathematics
2 answers:
RUDIKE [14]3 years ago
7 0
Px+76=Qx+76

Px = Qx

P = Q

so A and C is the answer
TEA [102]3 years ago
3 0
The answer is A.

Explanation: It’s asking which of those will make the equations the exact same.

When asked for infinitely many solutions, it’s asking for which one is the same line.

If they’re the same line, they are on top of each other and therefore always touching.
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Help!! help!! help!! help!! help!! help!! help!! help!! help!!
oksian1 [2.3K]

Answer:

<em>(8.21, -20.79)</em>

Step-by-step explanation:

Given the simultaneous equation;

\frac{a}{b} - \frac{b}{2} = 10\\a - b = 29

From 2;

a = 29 + b ....3

Substitute 3 into 1;

\frac{29+b}{b} - \frac{b}{2}  = 10\\\frac{2(29+b)-b^2}{2b} = 10\\\frac{58+2b-b^2}{2b} = 10\\58+2b-b^2 = 20b\\b^2-2b-58 = -20b\\b^2-2b+20b -58 = 0\\b^2+18b-58 = 0\\

Factorize

b = -18±√18²-4(-58)/2

b = -18±√324+232/2

b = -18±√556/2

b = -18±23.58/2

b = -18-23.58/2 and -18+23.58/2

b = -41.58/2 and 5.58/2

b = -20.79 and 2.79

Since a = 29 + b

when b = -20.79

a = 29 - 20.79

a = 8.21

<em>Hence the solution to the system of equation is (8.21, -20.79)</em>

7 0
3 years ago
A ball is hit into the air with an initial velocity of 100 ft/s. Its height, h(t), after t seconds is given by the function h(t)
Lana71 [14]

at maximum. dt/dh=0

if you differentiate you will get

-32t=-100

t=3.125

8 0
3 years ago
Do all graphs of linear equations in two variables have a y intercept?
Gelneren [198K]

Answer:

Yes and no because not all are in the y intercept it depends

Step-by-step explanation:

8 0
3 years ago
The radius of a circular track is 50 feet. How many feet of fencing
mina [271]
314 feet of fencing
6 0
3 years ago
9.4 the tangent ratio<br> please help on #27 and 28
Ilya [14]

Answer/Step-by-step explanation:

27.

✔️Sin 23 = opp/hyp

Sin 23 = t/34

34*sin 23 = t

t = 13.3

✔️Cos 23 = adj/hyp

Cos 23 = s/34

s = 34*cos 23

s = 31.3

28.

✔️Sin 36 = opp/hyp

Sin 36 = s/5

s = 5*sin 36

s = 2.9

✔️Cos 36 = adj/hyp

Cos 36 = r/5

r = 5*cos 36

r = 4.0

29.

✔️Sin 70 = opp/hyp

Sin 70 = w/10

w = 10*sin 70

w = 9.4

✔️Cos 70 = adj/hyp

Cos 70 = v/10

v = 10*cos 70

v = 3.4

6 0
3 years ago
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