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2 years ago

The sum of twice a number and 15 is grater the 3

Mathematics

1 answer:

NNADVOKAT [17]2 years ago

4 0

Answer:

x>-6

Step-by-step explanation:

The expression you need to solve for this is: 2x+15>3

For now pretend that the > is a = and solve as you normally would for x.

Subtract 15 from both sides

2x=-12

Divide by 2

x=-6

Put the > back in

x>-6

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Consider the expressions 3x(x − 2) + 2 and 2x2 + 3x − 18.

Rzqust [24]

Answer:

See answer below

Step-by-step explanation:

For the first expression

3 x (x - 2) + 2 = 3 x^2 - 6 x + 2

evaluated at x= 4 we get: 26

and for x = 5 we get 47.

For the second expression

2 x^2 + 3 x - 18

we get the exact same values when doing the evaluation at these two points.

Based on those results, one may think the expressions may be equivalent, but they are not equivalent. Because at any other x-value, their results are different. See for example that for x = 0 the first one gives "2" while the second one gives -18.

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2 years ago

A family went out to eat at a restaurant. Their bill came to $64.20. They want to leave a 20% tip. How much will they leave as a

adelina 88 [10]

Answer:

$12.84

Step-by-step explanation:

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8 0

2 years ago

Which is the correct answer?

vovangra [49]

B is the correct answer , it is incorrect.

5 0

3 years ago

Read 2 more answers

-7m+4< -45 for solving an inequality

worty [1.4K]

Solving the inequality $-7m+4< -45$ we get $m>7$

Step-by-step explanation:

We need to solve the inequality: $-7m+4< -45$

Solving:

$-7m+4< -45$

Adding -4 on both sides:

$-7m+4-4< -45-4$

$-7m< -49$

Divide both sides by -7 and reverse the inequality:

$\frac{-7m}{-7}>\frac{-49}{-7}$

$m>7$

So, solving the inequality $-7m+4< -45$ we get $m>7$

Keywords: Solving inequalities

Learn more about Solving inequalities at:

#learnwithBrainly

4 0

3 years ago

Mark got 14 problems wrong on his test. His score was 72% correct. How many problems were on the test? Please show work.

stira [4]

Consider that 100%-72%=28% represents the percentage of wrong answers. I would think as fractions as:
if 100% is the total number of answers and 28% are the wrong ones
as
if x is the total you have 14 wrong you can write:
$\frac{100}{28} = \frac{x}{14}$
x=(100/28)*14=50 questions

7 0

3 years ago