2 years ago

Evaluate the expression when у = 3 and z = 9. 2 y + (z-7)² x 2

Mathematics

1 answer:

borishaifa [10]2 years ago

5 0

Step-by-step explanation:

$y + (z - 7) {}^{2} \times 2 \\ 3 + (9 - 7) {}^{2} \times 2 \\ 3 + (2) {}^{2} \times 2 \\ 3 + 4 \times 2 \\ 3 + 8 = 11$

You might be interested in

A school theater director is planning a voluntary trip to New York City for students. He sends a poll regarding interest

PilotLPTM [1.2K]

Answer:

Sixty-eight percent is likely an overestimate for the percentage of parents interested in the trip.

Step-by-step explanation:

6 0

2 years ago

The ratio of peter's height to albertina's height is 147cm what is peter's height

stellarik [79]

Answer:

4'9.87

Step-by-step explanation:

8 0

2 years ago

The base of a trinagle is increased by 20% and it’s height is increased by 30%. By what percent is the area of the triangle incr

Molodets [167]

Lets say the base is x and the height is y. The new base would be 1.2x and the new height would be 1.3y

Area of a triangle is base times height divided by 2:

1.2x*1.3y/2 = (1.2*1.3 + x*y)/2 = 1.56xy/2 = 0.78xy = 78% of xy

But a normal area would be 50% of xy

78% - 50% = 38%

ANSWER: 38% increase

4 0

3 years ago

The vertices of a triangle are A (-2, 2), B (4,10), and C (0, -2). Find the equation of the line that contains

Tpy6a [65]

Answer:

y = 1/2 x + 3

Step-by-step explanation:

mid point of line BC = (2, 4)

slope of the line containing median (m) = 1/2

y intercept (b)= 3

since y = mx + b

y = 1/2x + 3

4 0

3 years ago

A train travels from Washington DC to new york(225 miles). The train departs at 4:55 PM and arrives in New York at 7:55 PM. What

mylen [45]

Answer:

The average speed is:

$\var{v}=75\: miles/h$

Step-by-step explanation:

The average speed equation is given by:

$\var{v}=\frac{\Delta x}{\Delta t}$

Were:

Δx is the displacement (225 miles)
Δt is the change in time (3 hours)

Then we have:

$\var{v}=\frac{225}{3}$

$\var{v}=75\: miles/h$

I hope it helps you!

4 0

2 years ago