2 years ago

Which of these is a unit rate?

Mathematics

1 answer:

Verdich [7]2 years ago

5 0

Answer:

18 students in a class

Step-by-step explanation:

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The team only gained 7 yards

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3 years ago

Find the product and sum of the roots of the equation:<br> 2x^2-9x-10=0

BabaBlast [244]

Answer:

<h3> sum of the roots: $x_1+x_2=4\frac12$ </h3><h3> product of the roots: $x_1x_2=-5$ </h3><h3> Step-by-step explanation:</h3>

$2x^2-9x-10=0\quad\implies\quad a=2\,,\ b=-9\,,\ c=-10$

$b^2-4ac=(-9)^2-4(2)(-10)=81+80=161>0$

From Vieta's formulas applied to quadratic polynomial we have:

if $b^2-4ac\geqslant0$ then

sum of roots: $x_1+x_2=-\dfrac ba=-\dfrac{-9}2=4\frac12$

product of the roots: $x_1x_2=\dfrac ca=\dfrac{-10}2=-5$

3 0

3 years ago

Find the surface area of a square prism with a side measure of 15

Phoenix [80]

Since the length is 15, and the width would be 15, you need to first do 15 x 15.

15 x 15 = 225

Multiply the 6 faces.

225x6

Your final answer would be 1,350.

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3 years ago

Find the value of x.<br>A. 90 <br>B. 70 <br>C. 20 <br>D. 50

emmasim [6.3K]

Answer: B. 70

Step-by-step explanation:

i actually can't tell but i think this is right

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3 years ago

A grocery store is selling 6 cans of cat food for $3. Write and solve a multiplication equation.

Nastasia [14]

Your answer would be $18 for 6 cans of cat food

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3 years ago