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d1i1m1o1n [39]
3 years ago
8

Evaluate 7j+5-8k when j=0.5 and k=0.25

Mathematics
2 answers:
dlinn [17]3 years ago
6 0

So first you would substitute j and k in the expression.

7(0.5)+5-8(0.25)

3.5+5-2

It would equal 6.5

Hope this helps!

lions [1.4K]3 years ago
3 0

Hey there! Welcome to Brainly!

Let's plug in our values and evaluate.

7(0.5)+5-8(0.25)

3.5+5-2

8.5-2

6.5

Therefore, our answer is 6.5

I hope this helps! Have a great time here at Brainly!

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10t+<img src="https://tex.z-dn.net/?f=%5Cgeq" id="TexFormula1" title="\geq" alt="\geq" align="absmiddle" class="latex-formula">1
Umnica [9.8K]

Answer:

The answer is t\geq 20.

Step-by-step explanation:

To solve the inequality, start by solving for the variable t.

To solve for the variable t, subtract 3.5t from both sides. The inequality will look like 6.5t\geq 130.

Then, divide both sides by 6.5 in order to get the variable t by itself. The inequality answer will look like t\geq  20.

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D and E —> substitute the x or y of the point given into the functions to test if it is correct
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3 years ago
Does the table represent a function ? If so, state the domain and range. If not, state why. (Picture)
andrezito [222]

Yes

For f(x) to represent a function each value of x from the domain must only map to one unique value in the range, called one-to-one

This is the case here as each value of x maps to one unique value in the range

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7 0
3 years ago
I need help with these two trigonometry problems.
Sloan [31]

Answer:

B \approx 32.1\°; A \approx 39.0\°

Step-by-step explanation:

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\frac{sin\ \alpha}a = \frac{sin\ \beta}b =\frac{sin\ \gamma}c

In our case, for the left triangle,

\frac {sin\ 103\°}{11} =\frac{sin\ B} 6 \rightarrow sin\ B = \frac6{11} sin\ 103\°

Time to grab a calculator and crunch numbers. Double check your calculator is in degrees and not in radians (plug in sin 30°, if you're getting 0.5 you're good) and you will get

sin\ B \approx 0.53 \rightarrow B \approx 32.1\°

Same difference with the right triangle. With the same calculations

sin\ A = \frac{26}{41} sin 83\° \approx 0.68 \rightarrow A \approx 39.0\°

5 0
2 years ago
True Or False?
natali 33 [55]
Electromagnets are devices that create a magnetic field through the application of electricity. Strong electromagnets are used to lift, move and drop heavy objects, such as vehicles. Electromagnets have advantages over permanent magnets. When the current is switched off, the electromagnet will lose its magnetism. The car will fall back to earth and we need that when we move cars in a junkyard. With a regular ( permanent ) magnet it would be much harder to do.
Answer: A. True

4 0
3 years ago
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