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2 years ago

Is this in proper standard notation? 5x - 5y = 7

1 answer:

8 0

Yes this is in standard form Ax+By = C. In this case, A = 5, B = -5 and C = 7. We cannot simplify this any further because the GCF of the three values is 1.

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Please help.<br> A<br> B<br> C<br> D

s344n2d4d5 [400]

Answer:

A. t(x) = 450 - 0.06x

Step-by-step explanation:

The layer which is originally 450 m thick is decreasing by 0.06 m.

450 - 0.06

... per day. x represents days.

0.06x

So,

450 - 0.06x

6 0

3 years ago

Which of the lists of letters all have line symmetry?

Sunny_sXe [5.5K]

Answer:

The first row

Step-by-step explanation:

Letters A,B,C,D

6 0

2 years ago

Read 2 more answers

Write the following phrase as a variable expression. Use x to represent "a number".

mojhsa [17]

Sum means add, a number means x, and four means, uh, 4...

x+4. is what you're looking for

3 0

3 years ago

Suppose you are investigating the relationship between two variables, traffic flow and expected lead content, where traffic flow

prisoha [69]

Answer:

The answers is " Option B".

Step-by-step explanation:

$CI=\hat{Y}\pm t_{Critical}\times S_{e}$

Where,

$\hat{Y}=$ predicted value of lead content when traffic flow is 15.

$\to df=n-1=8-1=7$

$95\% \ CI\ is\ (463.5, 596.3) \\\\\hat{Y}=\frac{(463.5+596.3)}{2}\\\\$

$=\frac{1059.8}{2}\\\\=529.9$

Calculating thet-critical value $t_{ \{\frac{\alpha}{2},\ df \}}=-2.365$

The lower predicted value $=529.9-2.365(Se)$

$463.5=529.9-2.365(Se)\\\\529.9-463.5=2.365(Se)\\\\66.4=2.365(Se)\\\\Se=\frac{66.4}{2.365} \\\\Se=28.076$

When $99\%$ of CI use as the expected lead content: $\to 529.9\pm t_{0.005,7}\times 28.076 \\\\=(529.9 \pm 3.499 \times 28.076)\\\\=(529.9 \pm 98.238)\\\\=(529.9-98.238, 529.9+98.238)\\\\=(431.662, 628.138)\\\\=(431.6, 628.1)$