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3 years ago

A^2 + 6ab for a=-3 and b=4

Mathematics

1 answer:

Marianna [84]3 years ago

3 0

Answer:

multiply a by 2 divide a and 3

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12' Given that tan x = sin x + cos x? î, what is the value of (WAEC]

Andre45 [30]

Answer:

$\tan(x) = \sin(x) + \cos(x)$

Sorry but your question is not too explanatory but I sure hope this helps

3 0

3 years ago

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

3 years ago

PLS HELP RN $4000 student loan. 10% compound interest annually. Total loan amount by 4 years?

ddd [48]

Answer:

$2,400

Step-by-step explanation:

We get 10% of 4,000 by dividing 4,000 by 10.

4,000 ÷ 10 = 400

To get the amount that 4,000 is subtracted by we multiply 400 by 4.

400 × 4 = 1,600

To get the answer we subtract 4,000 by 1,600.

4,000 - 1,600 = 2,400

Hope I helped!

3 0

3 years ago

Vidal bought 2 pizzas he cut each into 8 slices. he and his friend ate 10 slices. write an expression to match the word

Vilka [71]

$(2 \times 8) - 10$

4 0

3 years ago

Read 2 more answers

The dimensions of a rectangle are given in

alexandr1967 [171]

Option A and Option F

The expressions that represent the perimeter of rectangle are 4s + 1 and $2(2s + \frac{1}{2})$

Solution:

From figure,

Length = s

Width = $s + \frac{1}{2}$

The perimeter of rectangle is given as:

perimeter = 2(length + width)

Substituting the values we get,

$perimeter = 2(s + s + \frac{1}{2})\\\\perimeter = 2(2s + \frac{1}{2})$

Thus option F is correct

On further simplification,

$perimeter = 2(2s + \frac{1}{2})\\\\perimeter = 4s + 2(\frac{1}{2})\\\\perimeter = 4s + 1$

Thus Option A is correct

3 0

3 years ago