All categories

3 years ago

Let x = 6. What is the value of the expression 5x2+x−7 ? Enter your answer in the box.

Mathematics

2 answers:

12345 [234]3 years ago

5 0

This would be 5(6)^2 + 6 - 7

= 180 + 6 - 7 = 179

lutik1710 [3]3 years ago

3 0

5x2+x-7

= 10+6-7
= 16-7
= 9

I hope this is what you're looking for :)

You might be interested in

Twenty pounds of a salt-water solution contains fifteen percent salt. How much salt is in the water?

SVETLANKA909090 [29]

It is 15% of 20 pound water
15/100x20
3lb

5 0

3 years ago

Read 2 more answers

2) Evaluate 9 X 364 – 9 X 125 – 9 X 39 without the use of your calculator

Brums [2.3K]

Answer:

9*364 - 9*125 - 9*39 = 1,800

Step-by-step explanation:

Mental Calculation

If we detect known patterns in the calculations, we could easily give their results without the use of calculators.

We are given the expression to evaluate:

9*364 - 9*125 - 9*39

The first thing to note is the 9 is a common factor of all terms, thus we take it out:

9*(364 - 125 - 39)

The negative numbers can be easily added

125

+ 39

------------

164

Now our expression is much easier:

9*(364 - 164)

The subtraction of 364-164 is 200, thus the result of the operations is:

9*200. We only need to recall 9*2=18 and add two zeros to get 1,800, thus:

9*364 - 9*125 - 9*39 = 1,800

7 0

3 years ago

If c= the number of cars in a parking lot, which algebraic expressions represent the phrase below? 9 more than the number of car

Anestetic [448]

C + 9 because you are adding o mode cars and an expression doesn't have an equal sign (=)

5 0

3 years ago

Read 2 more answers

The midsegment of a trapezoid is always parallel to each base true or false

Deffense [45]

Answer:

True

Step-by-step explanation:

we know that

The Trapezoid Mid-segment Theorem states that : A line connecting the midpoints of the two legs of a trapezoid is parallel to the bases, and its length is equal to half the sum of lengths of the bases

see the attached figure to better understand the problem

EF is the mid-segment of trapezoid

EF is parallel to AB and is parallel to CD

EF=(AB+CD)/2

The mid-segment of a trapezoid is always parallel to each base

therefore

The statement is true

8 0

3 years ago

What is the gravity of a location if the mass of an object is 300 kg and it has a weight of 450N ?

kozerog [31]

The gravity is 1.5m\s^2

Further explanation:

The weight of any object is given by the product of mass and gravity of the object

Let

m denote the mass of object

g be the gravity

and

w be the weight

Then the statement can be mathematically written as:

$w=m*g$

Given

m=300kg

w=450N

Putting the values of m and w into the formula

$450=g*300\\g= \frac{450}{300}\\g=1.5\ ms^{-2}$

The gravity is 1.5m\s^2

Keywords: Mass, Gravity

Learn more about gravity at:

#LearnwithBrainly

7 0

3 years ago