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3 years ago

Please help, need answer fast! What is the value of 3ab + 5b - 6 when a = -1 and b = 3?

Mathematics

1 answer:

sasho [114]3 years ago

7 0

I believe it would be 0.

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I need help!!!!!!!!!!!!

Crazy boy [7]

Answer:

13.53................

6 0

3 years ago

Answer these for me please pretty please

anzhelika [568]

Answer:

1. t = 48.654

2. $x = \frac{8}{3}$

3. $s = \frac{49}{4}$

4. $y = \frac{19}{12}$

Step-by-step explanation:

To solve equations using variables, perform inverse operations to undo each part and isolate the variable.

1. $\frac{t}{5.4} =9.01$

Multiply by 5.4 on both sides to undo division.

t = 9.01 * 5.4

t = 48.654

2. $\frac{3}{4}x = 2$

Multiply both sides by the reciprocal of 3/4 which is 4/3.

$x = 2*\frac{4}{3} \\x = \frac{8}{3}$

3. $s + \frac{1}{4} = 12\frac{1}{2}$

Convert 12 1/2 into an improper fraction.

$s + \frac{1}{4} = \frac{25}{2}$

Subtract 1/4 from both sides.

$s + \frac{1}{4} - \frac{1}{4} = \frac{25}{2} - \frac{1}{4}$

To subtract fractions without common denominators, convert 25/2 into a fraction with denominator of 4.

$s = \frac{50}{4} - \frac{1}{4}\\s = \frac{49}{4}$

4. $2\frac{2}{3} + y = 4 \frac{1}{4}$

Subtract 2 2/3 from both sides.

$2\frac{2}{3} - 2\frac{2}{3} + y = 4 \frac{1}{4}- 2\frac{2}{3}$

Convert each fraction into improper fractions and then to common denominators.

$y = \frac{17}{4} - \frac{8}{3}\\\\ y = \frac{51}{12} - \frac{32}{12} \\\\y = \frac{19}{12}$

6 0

4 years ago

A movie theater sold 5 times as many children's tickets as adult tickets to an afternoon show. If 132 tickets were sold in all,

vitfil [10]

104 children's tickets

3 0

3 years ago

Read 2 more answers

CAN ANYONE PLEASE (WHO IS AN EXPERT AT MATHEMATICS) HELP ME WITH THIS.

NikAS [45]

Answer:

5 units were bought

Step-by-step explanation:

Firstly, let us calculate the total amount paid

If what was paid was $9.45, this cost includes the price of the coupon subtracted

Returning the coupon price, we have the total as;

9.45 + 0.5 = $9.95

So to get the number bought, we divide this total by the price for one

We have this as;

9.95/1.99 = 5

4 0

3 years ago

Read 2 more answers

What is 0.000000685 written in scientific notation?

maria [59]

we have

$0.000000685$

we know that

$0.000000685=\frac{685}{1,000,000,000} =\frac{685}{10^{9}}=685*10^{-9}$

$685*10^{-9} =6.85*10^{-7}$

therefore

<u>the answer is</u>

$6.85*10^{-7}$

3 0

3 years ago

Read 2 more answers