3 years ago

Yesterday Ron --- his dad make lunch. (Past time)help,helped

Mathematics

1 answer:

user100 [1]3 years ago

5 0

Answer:Yesterday, Ron helped his father

Step-by-step explanation:

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|0.7x+5|>6.7<br><br>Help plz

Pavlova-9 [17]

Answer:

$\large\boxed{x\dfrac{17}{7}}\\\downarrow\\\boxed{x\in\left(-\infty,\ -\dfrac{117}{7}\right)\ \cup\ \left(\dfrac{17}{7};\ \infty\right)}$

Step-by-step explanation:

$|0.7x+5|>6.7\iff0.7x+5>6.7\ or\ 0.7x+56.7\qquad\text{subtract 5 from both sides}\\0.7x>1.7\qquad\text{divide both sides by 0.7}\\x>\dfrac{1.7}{0.7}\to x>\dfrac{17}{7}\\\\(2)\\0.7x+5$

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2 years ago

A woman is randomly selected from the 18-24 age group. For women of this group, systolic blood pressures (in mm Hg) are normally

dybincka [34]

Answer:

0.0274

Step-by-step explanation:

The mean is $\mu =114.8$ and the standard deviation is $\sigma =13.1.$

Calculate

$Z=\dfrac{X-\mu}{\sigma}$

for $X=140:$

$Z=\dfrac{140-114.8}{13.1}\approx 1.9237.$

If $X\sim N(114.8,\ 13.1),$ then $Z\sim N(0,1)$

and

$Pr(X>140)=Pr(Z>1.9237).$

Use table for normal distribution probabilities to get that

$Pr(Z>1.9237)=1-Pr(Z\le 1.9237)=1-0.9726=0.0274.$

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3 years ago

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dolphi86 [110]

Answer:

model B is shaded to represent 37.5%

here,

=3÷8×100%

=37.5%

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2 years ago

How to do this problem 2 + 1/8 - 1 1/3

Svetllana [295]

17/8 -11/3
51/24-88/24
-37/24 simplified is -1 13/24

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2 years ago

Please answer this!!

Reika [66]

The second one is correct

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2 years ago