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leva [86]
3 years ago
12

Which expression is equivalent to −4.6+(−0.4)+(−7.2) ?

Mathematics
2 answers:
Volgvan3 years ago
7 0

I took the test it's −4.6−(0.4+7.2)

den301095 [7]3 years ago
4 0
The 3rd one
-4.6-(0.4+7.2)
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In triangleABC, angle B= 90 degrees, cos(C)=15/17 and AB = 16 what is the measure of Angle A, Angle C and angle AC
Sergeeva-Olga [200]

Answer:

m∠C=28°, m∠A=62°, AC=34.1 units

Step-by-step explanation:

Given In ΔABC, m∠B = 90°, , and AB = 16 units. we have to find m∠A, m∠C, and AC.

As,  cos(C)={15}/{17}

⇒ angle C=cos^{-1}(\frac{15}{17})=28.07^{\circ}\sim28^{\circ}

By angle sum property of triangle,

m∠A+m∠B+m∠C=180°

⇒ m∠A+90°+28°=180°

⇒ m∠A=62°

Now, we have to find the length of AC

sin 28^{\circ}=\frac{AB}{AC}

⇒ AC=\frac{16}{sin 28^{\circ}}=34.1units

The length of AC is 34.1 units

3 0
4 years ago
Need help please I’m begging yeah.
Simora [160]

Answer: The answer is B.

4 0
3 years ago
According to government data, the probability that a woman between the ages of 25 and 29 was never married is 40%. in a random s
ddd [48]
The probability of finding 2 never married
10c2*0.4^2*0.6^8=
the probability of finding 1 never married
10C1*0.4*0.6^9=
the probability of finding 0 never married
10C0*0.6^10=

the answer is all the above answers added together.
think you can do the rest of the calculation by yourself. :)

btw nCr=n!/(n-r)!r!
good luck
3 0
3 years ago
Can someone please help me answer these questions that are attached to the paper and the steps? Thanks in advance!!
Svetach [21]
Do lulus way. If you change the angles, you will not have a pentagon anymore. If you subtract, it wouldn’t be the same ratio:)
8 0
4 years ago
A local Elementary School has 560 students. A Random Sample of 50
Komok [63]
Well since there was 560 students the it was 560/560. now that 50 got selected the total portion would be 560/6
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3 years ago
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