3 years ago

Help me with questions 5 and 7 please show your work !

Mathematics

1 answer:

seraphim [82]3 years ago

7 0

Answer:

5) x = 77

7) b = 210

Step-by-step explanation:

5) 11 = X/7

multiply both sides by 7. doing this gets rid of the 7 on the right side of the equation.

(7)(11) = x

77 = x

7) 14 = b/15

same thing as above! multiply both sides by 15.

(15)(14) = b

210 = b

Hope this helps you!

You might be interested in

What is 186 divided by 0.24

wlad13 [49]

Answer:

775

Step-by-step explanatio

4 0

3 years ago

Five cubic meters of copper has a mass of 44,800 kilograms. What is the density of copper?

LUCKY_DIMON [66]

Density = mass / volume

Density = 44,800 kg/ 5m^3

Density = 8,960 km/m^3

8 0

3 years ago

What is 3 3/5 ×(-8 1/3)

Butoxors [25]

Answer:

Step-by-step explanation:

18/5 x -25/3

6/1 x -5/1 = -30

cross cancel the 18 & 3. Also the 5 & -25

6 0

4 years ago

Solve the simultaneous equation y-2x+1=0 and 4x^2+3y^2-2xy=7

Lapatulllka [165]

The first equation is $y-2x+1=0$

$y=2x-1$ (Equation 1)

The second equation is $4x^{2}+3y^{2}-2xy=7$ (Equation 2)

Putting the value of x from equation 1 in equation 2.

we get,

$4x^{2}+3(2x-1)^{2}-2x(2x-1)=7$

$4x^{2}+3(4x^{2}+1-4x)-4x^{2}+2x=7$

by simplifying the given equation,

$12x^{2}-10x-4=0$

$6x^{2}-5x-2=0$

Using discriminant formula,

$D=b^{2}-4ac$

$D=25-4 \times 6 \times -2 = 73$

Now the formula for solution 'x' of quadratic equation is given by:

$x=\frac{-b+\sqrt{D}}{2a} and x=\frac{-b-\sqrt{D}}{2a}$

$x=\frac{5+\sqrt{73}}{12} and x=\frac{5-\sqrt{73}}{12}$

Hence, these are the required solutions.

8 0

3 years ago

Factor the polynomical completely. m^4+13m^2+36

mr_godi [17]

$m^4+13m^2+36= (m^2+4)(m^2+9)$

7 0

3 years ago