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erastovalidia [21]
3 years ago
13

I need help with #21

Mathematics
1 answer:
maksim [4K]3 years ago
7 0

Answer: x=9

Step-by-step explanation:

(5x+7)

5 x 9 = 45

45 + 7 = 52

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What is 2/3 multiplied by 3equals what
Digiron [165]

Answer:

6/3 as an Improper Fraction.

2 as a whole number.

Step-by-step explanation:

2/3 multiplied by 3 is as shown below.

2/3 + 2/3 + 2/3.

As an Improper Fraction, the sum would be expressed as:

2 + 2 + 2 = 6. 6/3

2/3 • 3 = 2, since 6/3 = 2 as well.

3 0
3 years ago
HELP NEEDED AND GIVING EXTRA POINTS!!! 20 POINTS!
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Answer:

80 degrees

Step-by-step explanation:

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2 years ago
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(5+w)(w+4) in standard form
dlinn [17]

Answer:

  w² +9w +20

Step-by-step explanation:

Multiply it out, collect terms, and write as descending powers of w.

  (5+w)(w+4) = 5w +5·4 +w² +w·4

  = w² +9w +20

7 0
3 years ago
You are selling candy bars for the school to
Strike441 [17]

Answer:

200 bars

Step-by-step explanation:

$300 - $50 = the amount of money you still need, $250

250 dollars/$1.25 per bar = 200 bars you need to sell to get 300 dollars

7 0
3 years ago
Find the smallest zero of f(x+5)
podryga [215]

ANSWER

1. k=13

2. x=-10

EXPLANATION

The given function is

f(x) =  {x}^{2}   + 3x  - 10

To find f(x+5), plug in (x+5) wherever you see x.

This implies that:

f(x) =  {(x + 5)}^{2}   + 3(x + 5) - 10

Expand:

f(x) =   {x}^{2}    + 10x + 25+ 3x + 15- 10

Simplify to obtain

f(x) =   {x}^{2}    + 13x + 30

We now compare with,

f(x) =   {x}^{2}    + kx + 30

This implies that:

k = 13

To find the smallest zero of f(x+5), we equate the function to zero and solve for x.

{x}^{2}    + 13x + 30 = 0

{x}^{2}   + 10x + 3x + 30 = 0

x(x + 10) + 3(x + 10) = 0

(x + 3)(x + 10) = 0

x =  - 10 \: or \: x =  - 3

The smallest zero is -10.

7 0
3 years ago
Read 2 more answers
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