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3 years ago

Annie recorded the temperatures at which two oils freeze:

Mathematics

2 answers:

natka813 [3]3 years ago

8 0

Answer:

Peanut oil freezes at a higher temperature because 3.1°C > -20°C

Step-by-step explanation:

hope it help...

navik [9.2K]3 years ago

4 0

Peanut oil freezes at a higher temperature because 3.1°C > -20°C

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Solve the following system of equations for a and for b:

viktelen [127]

Answer:

$a=3\\b=1$

Step-by-step explanation:

$9a+3b=30\\8a+4b=28$

Let's solve the second equation for a to later on replace it in the first equation.

$8a+4b=28\\8a=28-4b\\a=\frac{28-4b}{8}$

Now plug this into the first equation.

$9a+3b=30\\9(\frac{28-4b}{8})+3b=30$

Distribute the 9

$(\frac{252-36b}{8}) +3b=30$

Break down the fraction.

$\frac{252}{8}-\frac{36b}{8}+3b=30$

Simplify.

$\frac{63}{2}-\frac{9}{2}b+3b=30$

Subtract $\frac{63}{2}$

$-\frac{9}{2}b+3b=30-\frac{63}{2}$

Combine like terms.

$\frac{-9+2*3}{2}b=\frac{30*2-63}{2}$

$\frac{-9+6}{2}b=\frac{60-63}{2}$

$\frac{-3}{2}b=\frac{-3}{2}$

Muliply by the reciprocal or inverted fraction next to b.

$(-\frac{2}{3})(-\frac{3}{2}) b=-\frac{3}{2}(-\frac{2}{3})$

$b=1$

Now plug this value into any of the equations to find the value of a.

$8a+4b=28\\8a+4(1)=28\\8a+4=28\\8a=28-4\\8a=24\\a=\frac{24}{8}\\ a=3$

5 0

4 years ago

What is the property of this equation? if 2x=8 then x=4

Eva8 [605]

Answer is 2 x 4=8 this is a scientific property

7 0

3 years ago

How would you simplify the expression represented by the diagram below? Four figures. The first consists of 4 squares each label

Sergeu [11.5K]

Answer:

6 x 3c

Step-by-step explanation:

6 0

3 years ago

Simplify 12y-(-4-8y)

Digiron [165]

Step-by-step explanation:

12y-(-4-8y)

= 12y +4 + 8y. ['-' getting multiplied when brackets open]

= 12y + 8y +4. [ Adding the like terms ]

= <u>20 y + 4 (Ans)</u>

4 0

3 years ago

Read 2 more answers

Evaluate the expression when x=-5 <br> X^2 + 6x-9

d1i1m1o1n [39]

The value of the function f(x) = x² + 6x - 9 when x = -5 is -14.

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

An independent variable is a variable that does not depends on other variable while a dependent variable is a variable that depends on other variable.

Given that:

f(x) = x² + 6x - 9

When x = -5:

f(-5) = (-5)² + 6(-5) - 9 = -14

The value of the function f(x) = x² + 6x - 9 when x = -5 is -14.

Find out more on equation at: brainly.com/question/2972832

#SPJ1

5 0

1 year ago