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azamat
3 years ago
11

HELP!!! solve the following system:y = x + 33x + y = 19

Mathematics
1 answer:
MariettaO [177]3 years ago
8 0
3x + (x+3) = 19
4x + 3 = 19
4x = 16
x = 4

y= x+3
y= 4+3
y= 7
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For what values of x is x2-36=5x true?<br> 0 -9 and -4<br> O4 and 9<br> O4 and -9<br> o 9 and 4
mars1129 [50]

Answer:

-4 and 9

Step-by-step explanation:

we have

x^{2} -36=5x

we know that

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0

is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

x^{2} -36=5x

x^{2}-5x-36=0

so

a=1\\b=-5\\c=-36

substitute in the formula

x=\frac{-(-5)(+/-)\sqrt{-5^{2}-4(1)(-36)}} {2(1)}

x=\frac{5(+/-)\sqrt{169}} {2}

x=\frac{5(+/-)13} {2}

x=\frac{5(+)13} {2}=9

x=\frac{5(-)13} {2}=-4

therefore

The equation is true for -4 and 9

4 0
3 years ago
Please help me ASAP! Consider the squares, where Square 1 is a translation of Square 2. Which statement is true?
Svet_ta [14]

Answer:

Option B.

Step-by-step explanation:

we know that

A <u>r</u><u><em>igid transformation</em></u>  is a transformation that does not alter the size or shape of a figure.

The translation is a rigid transformation that produce congruent figures

If two figures are congruent, then its corresponding sides and its corresponding angles are congruent

therefore

The squares are congruent because translations are rigid transformations that preserve the length of the sides of the square

8 0
3 years ago
How much money is required to buy 2 cakes of soap at $.18 a cake an 1 dozen eggs at $.65 a dozen
mestny [16]

Answer: 1.01$

Step-by-step explanation:

.18 + .18=.36

.36 + .65=1.01$

8 0
4 years ago
An object in shm oscillates with a period of 4.0s and an amplitude of 11 cm . part a how long does the object take to move from
Alika [10]
If the Amplitud is 11×2=22cm and the wave was in shm then we can get the wavelength as 11×2=22s.
From the wave equation, 

v=fλ Where v⇒speed
                    f⇒frequency and 
                    λ⇒Wavelength

And we know that; 
f=1/T
f = 1/4 =0.25 Hz
∴v = 0.25 ×22 = 5.5 cm/s

Since we know know the speed of the object we can get its time it takes from (0-6.5) cm.

v = fλ = λ/T

∴T = λ/v
     = 6.5/5.5
      = 1 2/11
      = 1.181818s

The time taken for the object <span>to move from x = 0.0 cm to x = 6.5 cm is </span>1.181818s

5 0
4 years ago
In parallelogram EFGH if GJ=15 find JE.<br> F<br> E<br> H
labwork [276]

Answer:

15

Step-by-step explanation:

So point j is the midpoint of both of the diagonals in the parallelogram.

That means that JE=GJ

So the answer is 15

7 0
3 years ago
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