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3 years ago

What is the value of the expression 2x²- 3x + 7 when x = 3? *

Mathematics

2 answers:

postnew [5]3 years ago

6 0

16
...................

kupik [55]3 years ago

3 0

16

.......................

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Solve the equation 5*e^x=15.76

liq [111]

Divide both sides by 5

e^x=3.152 take the natural log of both sides...

x=ln(3.152)

x≈1.148

3 0

3 years ago

During a sale, 20-cent candy bars were sold at 3 for 50 cents. How much is saved on 9 bars?

Mazyrski [523]

Answer:

Step-by-step explanation:

$0.30

Step-by-step explanation:

1 bar of candy = $0.20

3 bars of candy = $0.50

To solve, multiply for both:

If you pay for each candy bar individually, they each cost $0.20. Multiply 9 with 0.20:

9 x 0.20 = $1.80

If you pay for the candy bars by 3's, they cost $0.50 each pack. Divide 9 with 3, then multiply by 0.50:

9/3 = 3

3 x 0.50 = $1.50

Subtract the total cost of the individual from the pack:

$1.80 - $1.50 = $0.30

. $0.30 is your answer.

8 0

3 years ago

Which value cannot represent the probability of an event occurring?

andrew-mc [135]

Answer:

1.1

Step-by-step explanation:

1 in probability means always so anything greater than 1 is meaningless

6 0

3 years ago

12 is 90% of what number?<br><br><br> with steps

a_sh-v [17]

Answer:

<h3><u>Let's</u><u> </u><u>understand the concept</u><u>:</u><u>-</u></h3>

Here 12 is 90% of a number.
So we can say that 90% of That number is 12 .
In this way we can get the the number

<h3><u>Solution</u><u>:</u><u>-</u></h3>

Let,

the number=x

<h3>According to the question ,</h3>

${:}\longrightarrow$ $\sf 90\% \:of \;x=12$

We know 90%=90/100
so add it

${:}\longrightarrow$ $\sf {\dfrac {90}{100}}\times x=12$

${:}\longrightarrow$ $\sf {\dfrac {90x}{100}}=12$

Now use cross multiplication method

${:}\longrightarrow$ $\sf 90x=12\times 100$

${:}\longrightarrow$ $\sf 90x=1200$

Now interchange sides .

${:}\longrightarrow$ $\sf x={\dfrac {1200}{90}}$

${:}\longrightarrow$ $\sf x={\dfrac {200}{15}}$

Answer will come in decimals so we take approximate value.

${:}\longrightarrow$ $\sf x=13.3$

${:}\longrightarrow$ $\sf x=approximately \:13$

$\therefore$ The number is 13.

6 0

2 years ago

To graph the inequality x > -3, draw an open circle on -3 and shade to the left.

dedylja [7]

False, you graph an open circle on -3 and shade to the right because x must be larger than -3 and it can not equal -3

8 0

2 years ago