4 years ago

Please help me with these problems !

Mathematics

1 answer:

Semmy [17]4 years ago

6 0

7. 60 degrees
8. 33 degrees
9. 37 degrees
10. 74 degrees

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Simplify the expression to a polynomial in standard form: (4x+5) (x^2-3x-2) PLEASE HLEP

pickupchik [31]

Answer:

$4x^3-7x^2-23x-10$

Step-by-step explanation:

So we have the expression:

$(4x+5)(x^2-3x-2)$

Distribute. Multiply (4x+5) to each term:

$(x^2)(4x+5)+(-3x)(4x+5)+(-2)(4x+5)$

Distribute:

$=(4x^3+5x^2)+(-12x^2-15x)+(-8x-10)$

Combine like terms:

$=(4x^3)+(5x^2-12x^2)+(-15x-8x)+(-10)$

Add and simplify:

$=4x^3-7x^2-23x-10$

And this is in descending order, so it's in standard form.

7 0

3 years ago

HELP! The total cost for the soil was $14. How much did it cost per square metre?

lakkis [162]

Answer:

Rate = $2.08

Step-by-step explanation:

Area × rate = cost

rate = cost / area

= 14/6.52

= $2.08

8 0

3 years ago

Randy earned $57,890.00 of taxable income last year. If the federal income tax rate was 23%, then how much federal income tax di

Ganezh [65]

The answer will be c

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3 years ago

Which function has an axis of symmetry of x = −2?

dolphi86 [110]

Answer:

Step-by-step explanation:

f(x) = a(x+2)² +k

4 0

3 years ago

Diagram 2 shows a piece of rectangular card in grey colour

Ilya [14]

Solution:

we have given the length of the rectangular card-

$x + 5 \: cm$

and, width-

$7 \: cm$

now, the area of the card will be- length×width.

so, we have-

$(x + 5) \times 7 \: cm^{2} \\ 7x + 35 \: cm^{2}$

we also have given the length of ribbon-

$7 \: cm$

and, width-

$y \: cm$

so, area of the ribbon is-

length×width

$7 \times y \: cm^{2} \\ 7y \: cm^{2}$

now the area of shaded gray region will be-

$7x + 35 - 7y$

Hence, the required expression would the above expression.

6 0

3 years ago