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Alex Ar [27]
3 years ago
15

Select the statement that describes this expression: (10 − 3) x 4 + 5.

Mathematics
2 answers:
makvit [3.9K]3 years ago
8 0
It would definitely be the 3rd one! Use PEMDAS to help you find the order of things, Parentheses, Exponent, Multiply, Divide, Add, Subtract.
k0ka [10]3 years ago
7 0
3rd choice ~ Multiply 4 by the difference of 10 and 3, then add 5
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tamara has completed 60% of her practice time for the track meet. If she is expected to practice for 18h, how long has she alrea
anyanavicka [17]

Answer:

10h and 48min

Step-by-step explanation:

60*18=1080

1080/100=10.8

so 10.8h which means 10 hours and 48 min

4 0
3 years ago
Find the roots of h(t) = (139kt)^2 − 69t + 80
Sonbull [250]

Answer:

The positive value of k will result in exactly one real root is approximately 0.028.

Step-by-step explanation:

Let h(t) = 19321\cdot k^{2}\cdot t^{2}-69\cdot t +80, roots are those values of t so that h(t) = 0. That is:

19321\cdot k^{2}\cdot t^{2}-69\cdot t + 80=0 (1)

Roots are determined analytically by the Quadratic Formula:

t = \frac{69\pm \sqrt{4761-6182720\cdot k^{2} }}{38642}

t = \frac{69}{38642} \pm \sqrt{\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321}  }

The smaller root is t = \frac{69}{38642} - \sqrt{\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321}  }, and the larger root is t = \frac{69}{38642} + \sqrt{\frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321}  }.

h(t) = 19321\cdot k^{2}\cdot t^{2}-69\cdot t +80 has one real root when \frac{4761}{1493204164}-\frac{80\cdot k^{2}}{19321} = 0. Then, we solve the discriminant for k:

\frac{80\cdot k^{2}}{19321} = \frac{4761}{1493204164}

k \approx \pm 0.028

The positive value of k will result in exactly one real root is approximately 0.028.

7 0
3 years ago
8 is 1 tenth of what number
Elenna [48]

Answer:

80

Step-by-step explanation:

You can figure this out by creating an equation:

1/10 x=8        (This shows that 8 is 1/10 of number x)

x=80            (Solve the equation by multiplying by ten)  

4 0
3 years ago
Read 2 more answers
I need help with question 3 and 4
katrin2010 [14]
Question 3.  You divide 5 1/4 by 3/4 then multiply that by 20.
The answer is 140


7 0
4 years ago
Whats the product of 6 and<br><br> q
nevsk [136]

Answer:

6q or 6 * q

Step-by-step explanation:

As you do not know what the value of the variable q is, you are essentially changing it from word form to expression form.

"product" in math means multiply, so you are multiplying 6 with q.

6q is your answer.

~

7 0
4 years ago
Read 2 more answers
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