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3 years ago

Evaluate the expression when a=-7 and x=6 . X-2a

Mathematics

1 answer:

Ronch [10]3 years ago

3 0

Answer:

=X-2a

= 6- 2× (-7)

= 6 + 14

= 20

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Although the problem above may look really different or much harder than any equation we have solved before, guess what?! It’s n

defon

Answer:

4b+8 = 20

---------------

4b = 20

-------------------

b = 5

Step-by-step explanation:

We need to solve for b in the following equation:

$\frac{4b + 8}{2} = 10$

When we multiply each term by 2 the denominator cancels out:

$\displaystyle 2 \times \frac{4b + 8}{2} = 10 \times 2\\\\4b + 8 = 20$

Next, we subtract 8:

$4b +8 - 8 = 20 - 8\\4b = 20$

Final step, we isolate the variable. We cancel the multiplication on the left side when dividing by 4 on each term

$\displaystyle 4b = 20\\\\\frac{4b}{4} = \frac{20}{4}\\\\b = 5$

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2 years ago

Simplify 24 - 15 - 3+ 2.6.<br> O A. 30<br> O B. 31<br> O C. 126<br> O D. 15

sveticcg [70]

Answer:

Step-by-step explanation:

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3 years ago

What is 3.96 × 0.4, please help me

Kisachek [45]

Answer:

1.584

Step-by-step explanation:

1.584 = 3.96 × 0.4

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3 years ago

Read 2 more answers

For the graph x = -3 find the slope of a line that is parallel to it.

shutvik [7]

The ilne paralell to x=something is x=something else (both are constants)

slope=rise/run

x=-3
it rises infiniley and runs 0 (goes left to right 0)
slope=infinity/0=undefined

the slope is undefined
paralell lines have same slope
so the slope of a paralell line is also undefined

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2 years ago

Read 2 more answers

To start the school year, a teacher spends $54.35 in school supplies for her classroom. During the course of the year, she will

Sholpan [36]

co·ef·fi·cient

ˌkōəˈfiSHənt/Submit

noun

MATHEMATICS

a numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g., 4 in 4x y).

So, 22 is your coefficient.

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2 years ago