All categories

3 years ago

Evaluate x2 + 3x – 7+ 8 when x = 4.

Mathematics

2 answers:

antiseptic1488 [7]3 years ago

4 0

Answer:

Step-by-step explanation:

Substitute 4 for x into the expression x^2+3x−7+8 and then simplify using the order of operations.

4^2+3(4)−7+8

16+12−7+8

Karo-lina-s [1.5K]3 years ago

3 0

Answer:

Step-by-step explanation:

Since they have given you x = 4, simply sub it into the equation,

(4)^2 + 3(4) - 7 + 8

= 29

You might be interested in

X/7=x+14 / 5<br> Solve for X

elixir [45]

Answer:

x/7=x+14 / 5

Solve for X

Step-by-step explanation:

x/7=x+14 / 5

Solve for X

6 0

2 years ago

A shop owner bought 30 files and some diaries .he paid $82.50 for the files.each diary cost 10 times as much as a file.what was

Novay_Z [31]

<h3>✽ - - - - - - - - - - - - - - - ~<u>Hello There</u>!~ - - - - - - - - - - - - - - - ✽</h3>

➷ Divide total cost by the number of files:

82.50/30 = 2.75

Multiply by 10:

2.75 x 10 = 25.5

The cost was $27.50

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

7 0

2 years ago

PLEASE HELP ME!! ILL GIVE BRAINLIEST!!

Natalka [10]

Answer:

Step-by-step explanation:

1/4 is .25

4 fourths is 1. 4 times 7 equals 28 hamburgers. one half is two fourths. 28+2=30 hamburgers.

6 0

2 years ago

Read 2 more answers

Solve each system of equations; nonlinear algebra 2<br><br> x2 + x + y - 26 = 0<br> x + y = 1

BigorU [14]

Answer:

(5,-4) and (-5,6)

Step-by-step explanation:

Given:

$\left\{\begin{array}{l}x^2+x+y-26=0\\ \\x+y=1\end{array}\right.$

Solve it. First, express y in terms of x from the second equation:

$y=1-x$

Substitute it into the first equation:

$x^2+x+1-x-26=0\\ \\x^2-25=0\\ \\(x-5)(x+5)=0$

Apply zero product property:

$x-5=0\ \text{or}\ x+5=0$

So,

$x=5\ \text{or}\ x=-5$

When $x=5,$ then $y=1-5=-4$

When $x=-5,$ then $y=1-(-5)=6$

We get two solutions: (5,-4) and (-5,6)

8 0

3 years ago

In 2013, the population of the state of New York was approximately 19.65 million, and the population of New York City was 8,406,

steposvetlana [31]

Answer:

huhhhhhhhhhh

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers