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Serjik [45]
2 years ago
13

Evaluate the expression when x= -5.2 and y = –6.8. 4x-7y

Mathematics
1 answer:
vfiekz [6]2 years ago
7 0

Step-by-step explanation:

Substitute variables with given values

Minus sign becomes plus sign if a negative is multiplied by a negative or a negative is put next to a negative number.

4x-7y=4(-5.2)-7(-6.8)

-20.8+47.6=26.8

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Please help me ...............
KengaRu [80]

Answer:

b= 7 times the square root of 2

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Hope this helps

5 0
3 years ago
Read 2 more answers
Diameter Radius Area Circumference of= 132
AveGali [126]

Answer:

lets \:  \: find \:  \:  \: the \:  \:  \: radius \\ 2\pi \: r = 132 \\   \frac{2\pi \: r}{2\pi}  =  \frac{132}{2\pi}  \\ r = 21.01

lets \:  \:  \: find \:  \:  \: the \:area \: now \\  = \pi {r}^{2} \\  = \pi \times  {21.01}^{2}   \\  = 1,386.76

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7 0
3 years ago
The measure of an angle is seventy-one times the measure of its supplementary angle. What is the measure of each angle?
Degger [83]

Answer:

2 degrees and 178 degrees.

Step-by-step explanation:

So, remember if 2 angles are supplementary, they equal 180 degrees. Let's call the smaller angle x, meaning the bigger angle, which is 89 times the size of the smaller angle, would be 89x. Now let's put that into an equation.

180 = x + 89x

We now have to group the x's together:

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Now in order to determine x, we have to divide by 90 on both sides.

X= 2

So we know that the smaller angle is 2, meaning that if the larger angle is 89 times the size, the larger angle would be 178.

4 0
3 years ago
How can you use multiplication in your everyday life?
Bas_tet [7]

Answer:

On kitchen. Yes. there also we use multiplication. If we are trying to cook something from the recipe website, they tell to add 1 glass of water for 100 gm of rice. But we measure the amount of water based on the quantity of the rice. It’s simple multiplication.

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Step-by-step explanation:

5 0
3 years ago
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Alexandra [31]

Multiplying 3/7 by the reciprocal of -3/14,

\frac{3}{7} \times  \frac{14}{ - 3} \\  =  \frac{1}{1} \times  \frac{2}{ - 1} \\  =  \frac{2}{ - 1} \\  =  - 2

Hope it helps!!

7 0
3 years ago
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