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2 years ago

Combine like terms in the following expression: 2x+5y+7t+4p-x-4t+3y-4t-3p

Mathematics

1 answer:

Maslowich2 years ago

4 0

Answer:

Answer is option D. because 4p minus 3p is just p and D is the only option with just p.

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Kady and Scott both invest £800.

tresset_1 [31]

Answer:we smoking fredoooooooooo

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1 year ago

3x-y=-5 <br> x=2y+5 <br> y=3/4x - 2 <br> y=-2/3x - 2

arsen [322]

Idont under stand this thanks

8 0

2 years ago

Problem PageQuestion Calcium levels in people are normally distributed with a mean of mg/dL and a standard deviation of mg/dL. I

SIZIF [17.4K]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The calcium level that is the borderline between low calcium levels and those not considered low is $c = 8.68$

Step-by-step explanation:

From the question we are told that

The mean is $\mu = 9.5\ mg/dL$

The standard deviation $\sigma = 0.5 \ mg/dL$

The proportion of the population with low calcium level is $p =$ 5% = 0.05

Let X be a X random calcium level

Now the P(X < c) = 0.05

Here P denotes probability

c is population with calcium level at the borderline

Since the calcium level is normally distributed the z-value is evaluated as

$P(Z < \frac{c - \mu}{\sigma } ) = 0.05$

The critical value for 0.05 from the standard normal distribution table is

$t_{0.05} = -1.645$

=> $\frac{c - \mu}{\sigma } = -1.645$

substituting values

$\frac{c - 9.5}{0.5 } = -1.645$

=> $c - 9.5 = -0.8225$

=> $c = 8.68$

6 0

3 years ago

Can anyone answer this? I'll give brianliest I just really really need this

avanturin [10]

Answer:

yes 2=138 degrees

Step-by-step explanation:

Not hundo perecent sure, sorry if it's wrong, if you want me to show my work then please ask

4 0

3 years ago

Your surf shop sells two types of surfboards. The first type A, costs $272 and you make a profit of $29 on each one. The second

brilliants [131]

Let the number of type A surfboards to be ordered be x and the number of type B surfboards be y, then we have

Minimize: C = 272x + 136y

subject to: 29x + 17y ≥ 1210
x + y ≤ 50
x, y ≥ 1

From the graph of the constraints, we have that the corner points are:

(20, 30), (41.138, 1) and (49, 1)

Applying the corner poits to the objective function, we have

For (20, 30): C = 272(20) + 136(30) = 5440 + 4080 = $9,520
For (41.138, 1): C = 272(41.138) + 136 = 11189.54 + 136 = $11,325.54
For (49, 1): C = 272(49) + 136 = 13328 + 136 = $13,464

Therefore, for minimum cost, 20 type A surfboards and 30 type B surfboards should be ordered.

6 0

3 years ago