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3 years ago

The value of the expression x² - 2 ( x + 5 ) when x = 10.

Mathematics

1 answer:

hjlf3 years ago

3 0

Answer:

Step-by-step explanation:

10 2 - 2(10+5) = 100 - 2(10+5)=15

100 - 2 x 15 = 100 - 30

=70

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I NEED HELP PLEASE, THANKS! :)

Allushta [10]

Answer: proof below

<u>Step-by-step explanation:</u>

Use the Difference formula for sin:

sin (A - B) = sin(A)·cos(B) - cos(A)·sin(B)

sin (180° - θ) = sin(180°)·cos(θ) - cos(180°)·sin(θ)

= 0 · cos(θ) - -1 · sin(θ)

= 0 - -sin(θ)

= + sin(θ)

sin (180° - θ) = sin(θ) $\checkmark$

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in the six grade 54% of the are boys. there are 189 boys in the sixth grade. what is the total number of the students in sixth g

notka56 [123]

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3 years ago

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A spice store charges $2.75 for 25 grams of paprika. It also charges 5% of the purchase price for shipping any order

zlopas [31]

Answer:

Part a) The expression is $3.2445x$

Part b) Customer cannot buy 2.5 ounces of paprika and have it shipped for less than $8.00

Step-by-step explanation:

<u><em>The complete question is</em></u>

A spice store charged 2.75 for 25 grams of paprika. It also charges 5% of the purchase price for shipping any order.

Part a) Write and simplify an expression to determine the cost of buying and shipping x ounces of paprika. Use 1 ounce = 28 grams

Part b) Can a customer buy 2.5 ounces of paprika and have it shipped for less than 8.00? Explain

step 1

Convert grams to ounces

Remember that

$1\ oz=28\ g$

To convert grams to ounces divide by 28

$25\ g=25/28= 0.89\ oz$

The unit price is

$2.75/0.89=3.09\frac{\$}{oz}$

Let

x ----> the number of ounces of paprika

y ----> the cost of buying and shipping x ounces of paprika

5%=5/100=0.05

$y=3.09x+(3.09x)0.05\\y=3.09x[1+0.05]\\y=3.2445x$

Part b) For x=2.5 oz

substitute in the equation

$y=3.2445(2.5)=\$8.11$

$\$8.11 > \$8.00$

therefore

Customer cannot buy 2.5 ounces of paprika and have it shipped for less than $8.00

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3 years ago

Jack is holding nickels and dimes. He has 4 more dimes than nickels. He has a total of $.70 in his hand. How many of each coin d

Alexxandr [17]

Sorry it is 2 nickel which equals ₵10 and 6 dimes which equals ₵60 and when you add them together they equal ₵70

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4 years ago

If the factors of function f are (x-6) and (x - 1), what are the zeros of function f?

Masteriza [31]

Set each factor to zero
X-6=0
X-1=0
Solve for X
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Therefore, the answer is C

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