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3 years ago

Evaluate the expression when a=-6. a^2 + 5a - 5

Mathematics

2 answers:

JulijaS [17]3 years ago

6 0

Answer:

Step-by-step explanation:

(6)^2+5(6)-5

=36+30-5

=61

makvit [3.9K]3 years ago

6 0

Answer:

Step-by-step explanation:

$( - 6) {}^{2} + 5 \times - 6 - 5 \\ 36 - 30 - 5 \\ 36 - 35 \\ = 1$

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(N^3 - N^4) - (3n^3- 7n^4)

Free_Kalibri [48]

If you would like to solve (n^3 - n^4) - (3n^3 - 7n^4), you can do this using the following steps:

(n^3 - n^4) - (3n^3 - 7n^4) = n^3 - n^4 - 3n^3 + 7n^4 = n^3 - 3n^3 - n^4 + 7n^4 = -2n^3 + 6n^4

The correct result would be -2n^3 + 6n^4.

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3 years ago

Find the volume of a square pyramid with base edge = 9 cm

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Right square pyramid V=189cm³

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3 years ago

What is an equation of the line that passes through point (5,-8) and is parallel to the line x+y=7

Igoryamba

Answer:

The line given is equal to y=-x+7 (Through rearranging)

To find the new line, we substitute the given coordinates (5,8) in the equation without the given y-intersect (+7):

-8=-5+c

c=-3

The line parallel to x+y=7 that passes through the point (5,-8) is y=-x-3

4 0

3 years ago

Use the remainder Theorem to find the remainder for the given division. (16z^4-1)/(z+1)

Mice21 [21]

Remainder Theorem: when a polynomial P(x) is divided by (x - a), the remainder is P(a).

Given expression:

$\frac{16z^{4}-1}{z+1}$

In this case:

$P(z)=16z^4-1$ $z=-1$

To know the reminder, we have to plug in the value of z in the polynomial:

$P(-1)=16(-1)^4-1$

Simplifying:

$P(-1)=16(1)^{}-1$ $P(-1)=16^{}-1$ $P(-1)=15$

Answer: The remainder is 15.

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1 year ago

Solving a decimal word problem using a linear equation of the for...

Sindrei [870]

Answer:

5 pounds of coffee

Step-by-step explanation:

Let the number of pounds of coffee bought be 'x'.

Given:

Value on gift card = $90

Value of coffee per pound = $8.09

Money left after buying coffee = $49.55

Now, using unitary method,

1 pound cost = $8.09

∴ 'x' pounds cost = $8.09x$

Now, Money left = Total money on gift card - Cost of coffee.

$49.55=90-8.09x\\\\8.09x=90-49.55\\\\8.09x=40.45\\\\x=\frac{40.45}{8.09}=5$

Therefore, Lashonda bought 5 pounds of coffee.

6 0

3 years ago