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3 years ago

Will mark brainliest if you show ur work

Mathematics

1 answer:

Tanzania [10]3 years ago

8 0

Answer:

$\boxed{\bold{One \ Solution}}$

Step-by-step explanation:

Solve equation to find answer(s)

Combine: 6z - 3z = 3z

$\bold{3z-7=-2+3}$

Add: -2 + 3 = 1

$\bold{3z-7=1}$

Add 7 to both sides:

$\bold{3z-7+7=1+7}$

Simplify:

$\bold{3z=8}$

Divide both sides by 3:

$\bold{\frac{3z}{3}=\frac{8}{3}}$

Simplify:

$\bold{z=\frac{8}{3}}$

- M -

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Select the correct answer.

Nina [5.8K]

Answer:

D. $x^2 + 3x - 88$

Step-by-step explanation:

Area of rectangle = $length (l) * width (w)$

Length of rectangle = (x - 8)

Width = (x + 11)

Area of rectangle = $(x - 8)(x + 11)$

Expand the expression

$x(x + 11) -8(x + 11)$ (distributive property of multiplication)

$x^2 + 11x - 8x - 88$

Combine like terms

$x^2 + 3x - 88$

Expression for the area of the rectangle = $x^2 + 3x - 88$

7 0

3 years ago

Please help me Sooo confused!!!

SashulF [63]

Well let's say x = -1000
That's what I would do

8 0

3 years ago

Read 2 more answers

Sin 7A = cos 3A, then m∠A is what?

lbvjy [14]

Answer:

m∠A = 9°

Step-by-step explanation:

$\sin 7A = \cos 3A \\ \\ \sin 7A = \sin(90 \degree - 3A) \\ \\ 7A = 90 \degree - 3A\\ \\ 7A + 3A= 90 \degree \\ \\ 10A= 90 \degree \\ \\ A = \frac{90 \degree}{10} \\ \\ m \angle A =9 \degree$

8 0

3 years ago

Need help with this

netineya [11]

The answer to your question is C.

3 0

3 years ago

An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an est

MrRa [10]

Answer:

85% level of the confidence interval is

(26.337, 26.662)

Step-by-step explanation:

Explanation:-

Given the size of the sample 'n' = 295

Mean of the sample x⁻ = 26.5

The Standard deviation of the Population = 2.7

85% level of the confidence interval is determined by

$(x^{-} - Z_{0.15} \frac{S.D}{\sqrt{n} } , x^{-} + Z_{0.15} \frac{S.D}{\sqrt{n} })$

Critical value Z₀.₁₅ = 1.036

85% level of the confidence interval is determined by

$(x^{-} - Z_{0.15} \frac{S.D}{\sqrt{n} } , x^{-} + Z_{0.15} \frac{S.D}{\sqrt{n} })$

$(26.9 -1.036 \frac{2.7}{\sqrt{295} } , 26.5 + 1.036 \frac{2.7}{\sqrt{295} })$

( 26.5 - 0.1628 , 26.5+0.1628)

(26.3372,26.6628)

7 0

3 years ago