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JulsSmile [24]
3 years ago
8

(+7) x (-3) math intergers

Mathematics
2 answers:
ArbitrLikvidat [17]3 years ago
5 0

Answer:

-21

Step-by-step explanation:

(7)*(-3)=

7*-3=

-21

IrinaK [193]3 years ago
4 0

Answer:

-21

Step-by-step explanation:

- * + = -

- * - = +

+ * + = +

Here + * - = -

7* 3 = 21 and sign is -ve

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For males in a certain town, the systolic blood pressure is normally distributed with a mean of 125 and a standard deviation of
makkiz [27]

95% have a systolic blood pressure between 109 and 141

Empirical rule states that for a normal distribution, 68% are within one standard deviation from the mean, 95% are within two standard deviation from the mean and 99.7% are within three standard deviation from the mean.

Given that mean (μ) = 125, standard deviation (σ) = 8.

68% are within one standard deviation = μ ± σ = 125 ± 8 = (117, 133)

95% are within two standard deviation = μ ± 2σ = 125 ± 2*8 = (109, 141)

95% have a systolic blood pressure between 109 and 141

Find out more on empirical rule at: brainly.com/question/10093236

5 0
2 years ago
Tyrone went to a basketball game and bought a jersey that was on sale at a 30% discount. He also bought a hat that cost $37.89.
Dmitry [639]

Answer:

Jersey cost (without discount)= $65

Step-by-step explanation:

<u>First, we need to determine how much he spent on the jersey:</u>

Jersey cost (with discount)= 83.39 - 37.89

Jersey cost (with discount)= $45.5

<u>Now, the original cost of the jersey:</u>

Jersey cost (without discount)= discount cost / (1 - discount)

Jersey cost (without discount)= 45.5 / 0.7

Jersey cost (without discount)= $65

7 0
3 years ago
Find the solutions to 40x2 – 140 = 500
Fofino [41]
I suggest downloading Desmos! It’s an app and it will help a lot with algebra.
7 0
3 years ago
20. What is the reciprocal of 5 3/4?
pogonyaev

Answer:

hi good morning

Step-by-step explanation:

i think it must be 23/4 or 46/8 etc.

hope it helped

4 0
3 years ago
Read 2 more answers
It costs Raquel 5$ in tolls to drive to work and back each day, plus she uses 3 gallons of gas. It costs her a total of 15.50$ t
Umnica [9.8K]

Answer:

$3.50

Step-by-step explanation:

Let x be the cost of per gallon gas.

We have been given that it costs Raquel 5$ in tolls to drive to work and back each day, plus she uses 3 gallons of gas. It costs her a total of 15.50$ to drive to work and back each day.

We can represent this information as:

3x+5=15.50

3x+5-5=15.50-5  

3x=10.50    

x=\frac{10.50}{3}

x=3.50  

Therefore, Raquel is paying $3.50 for per gallon gas.

5 0
3 years ago
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