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kherson [118]
2 years ago
14

(This is a word problem) You are making up your own mix of concrete to patch a set of stairs. In order to have the proper mix, y

ou need to mix 1 part of Portland cement with 2 parts of sand and 3 parts of gravel.
a. How many total parts are in one batch of concrete?
b. You make a mix with 4 parts of sand. How many total parts cement, sand, and gravel are in your mix?
Mathematics
1 answer:
Alina [70]2 years ago
8 0
The is 42 because that the answer to the question
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5. A function is given below.<br> f(x) = 3x2 - x + 6<br> What is f(2)?<br> 2
goldenfox [79]

Answer:   10

Step-by-step explanation:

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

f(x)= 6 - 2 + 6

f(x)=  4 + 6

f(x) = 10

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3 years ago
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olga_2 [115]
You first add up how many erasers there are in the bag so there are 20 and then you check how many purple erasers there are and so there are 5 and so the answer is 5/20 or 1/4 which is 0.25 as a decimal and if you do probability the answer has to be in between o and 1 and so 0.25 is in between 0 and 1 so it should be correct 
3 0
3 years ago
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During a sale, a store offered a 20% discount on a TV that originally sold for $710. After the sale, the discounted price of the
Mademuasel [1]

Answer:

$681.60

Step-by-step explanation:

<u><em>Given:</em></u>

<em>During a sale, a store offered a 20% discount on a TV that originally sold for $710. After the sale, the discounted price of the TV was marked up by 20%</em>

<u><em>To Find:</em></u>

<em>What was the price of the TV after the markup? Round to the nearest cent.</em>

<u><em>Solution:</em></u>

$710 × (1 + 20%) × (1 - 20%)

$710 × 1.2 × (1-0.2)

$710 × 1.2 × 0.8

($710 × 1.2) × 0.8

852 × 0.8

= $681.60

<u><em>Kavinsky</em></u>

4 0
2 years ago
Find the Area of the figure below, composed of a rectangle and a semicircle. Round to the nearest tenths place.
luda_lava [24]

Answer:

286.97

Step-by-step explanation:

find the area of the rectangle first

14*15=210

Next

Find the area of a circle

πr^2=a

the radius of the circle is half the height of the rectangle

π*(7*7)=a

a=153.94

Now

Divide the area by two

153.94/2=76.97

Now add the two areas

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7 0
3 years ago
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PLEASE HELP<br> find the vertex of f(x)=x^2+2x+3 (make sure you show your work)
kotegsom [21]

Answer:

(- 1, 2)

Step-by-step explanation:

Given a quadratic in standard form y = ax² + bx + c : a ≠ 0

Then the x- coordinate of the vertex is

x_{vertex} = - \frac{b}{2a}

f(x) = x² + 2x + 3 ← is in standard form

with a = 1 and b = 2, hence

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Substitute x = - 1 into f(x) for corresponding value of y

f(- 1) = (- 1)² + 2(- 1) + 3 = 1 - 2 + 3 = 2

vertex = (- 1, 2 )

4 0
3 years ago
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